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Taking a moment to really look over her reflection, Michelle admired her current visage for what she figured might be the last time for the next few weeks. Not that she would be long without it, mind. Assuming that everything went well with the procedure, of course. As far as she understood it, it was as safe as could be to take a nanite cocktail and change her body slowly into another species entirely. And it was something she needed to do as part of the contract she had signed. Something she had done eagerly, as much for the fame and paycheck as much as getting to explore a childhood interest that had lived in the fringes of her mind ever since the technology for its implementation came to be a reality.

Michelle was speechless to have landed the role in the reboot based on the old film 'Cat-People'. This movie was to be more of a romance/erotica, something corporations were trying due to an increase in using the nanite technological changes for sexual pursuits. Trying to appeal to that audience, figured their director, was an untapped market, one that everyone working on the film hoped would turn out to be the case.

Michelle was relatively new to the business, having only roles in commercials and brief appearances as one-off characters in the Sci-Fi genre. She was in need of a breakout role, something edgy that would cause her to stand out among her peers. Given the newness of transformation technology for Sci-Fi films, it was the perfect role. Even the more intimate parts of the process and the subsequent scenes in the film were not deterrent enough for her to turn it down.

Michelle was a little surprised to learn that nanite technology, though expensive in its own right, was cheaper than using traditional special effects. That and the truism of its use made it obvious it would look better than those traditional methods. It was one of the first of its kind, and the company hoped to make bank off that unique premise!

The story, as she understood it, was that she and the male lead would be infected with some sort of Were Panther curse, living with increasingly animalistic parts as the film went on. There was a need to film in one go, actually changing in real-time during the process. It would be a difficult endeavor to live with partial panther features over the course of the days it would take for the changes to happen. But, at least her reactions to the changes would be genuine. The changes would be full and permanent in the premise of the film, and part of its erotic nature was to show shot for shot the entire transformation in painstaking detail. It was something Michelle was fine to experience, given her penchant for change.

Despite the foreign nature of the premise, the movie itself was supposed to be more of a romance or erotica. Michelle was supposed to fall for the man who would be her onscreen costar as they turned into panthers together. They would be expected to have sex at several points in the film, though that, too, wasn't too unwelcome a prospect. There was something arousing about the prospect of bestial sex, one that made her loins ache from the thought. Not something she would admit to anyone, though something that would be viewed as good acting while she secretly partook in animalistic pleasures.

Within the plot of the film, her male costar would be playing a true-born Were panther, something that could not be transferred with sex, unless that male were to mate with someone carrying the Were panther gene. Not knowing her status, their sexual intercourse would trigger the dormant genes, and the plot of the film would follow their gradual changes and how they adapted to their lost humanity while desperately searching for a cure. Michelle, being in heat from her changes, would be a catalyst that he couldn't resist. After a hard time apart and dealing with their new realities, they would eventually come together, promising to be together as they eventually learned to live their lives as animals.

By this point, most of the scenes of flirting and even the sex had been shot already, though those could be reshot later once the pair had been changed back. Michelle had to admit, they were rather fun, all things considered. The guy was hot, and certainly her type. Even outside their scenes together, he seemed amicable toward her, not full of himself as many actors were, especially outrageous for their current low standing in the industry. It was only in a friendly way, but with the flirting they performed for the movie thus far, Michelle, against her better inclinations, had a hard time separating it. Oh well. She decided it was best to just go for it for now, thinking the reality of the feelings would allow her to act the part even better.

And now, it was time for her to be injected by the nanites that would slowly start to change her, bit by bit, into a totally non-human cat. What would it feel like? Michelle did her fair share of research on the subject, trying to understand what it would be like to be an animal. There was little on the subject from the point of view of a human, though certainly a litany of information on cats in captivity. Some aspects were less than palatable, but she was sure she would get accustomed. After all, she would need to remain a feral panther for at least a couple of days for the purposes of filming.

At least the first changes did not need to be filmed, and she would be coming onscreen with the first changes having already occurred. So, she was able to enjoy them alone in the comfort of her trailer. Staring into the mirror, she waited with bated breath, eager to feel what was to come. The injection site was still a little sore, though hardly a sign the process was about to begin. Even with that in mind, Michelle couldn't help but look in the mirror every few minutes in her excitement!

Eventually, tingling began at the edges of her nose, as though something under the skin was waiting to burst through. Resisting the urge to rub the spot, Michelle was left to feel the discomfort, watching in the mirror for any sign of what had to be fur or whiskers. Not thinking it would take this long, she sighed, going back and forth between the mirror and her phone. Yet, eventually, the tingling reached the breaking point, and several dozen thick hairs suddenly burst out of the follicles, poking through the skin like rapidly growing weeds. Michelle was there to watch it happen, tempted to rub their contours but finding their formation too surreal.

The moment she did touch them, a shiver ran through her body, not expecting the level of sensitivity they possessed. The vibrations they made told her the size of her hand, the fingers, and even the arm beyond. They dwarfed the ability of touch in her fingers, and Michelle was delighted, knowing that if they were so sensitive already, then any other changes to her form might elicit similar exciting feelings beyond anything she was prepared to experience.

She was soon to get her to wish with the cartilage of her nose started to pop apart, reforming and flattening the bridge of her nose. It was a slow process, thankfully not painful, though disconcerting. Eventually, slits slid up the sides of her nose, ones that flared with each and every breath. The changes started to show on the bridge of her nose as well, which became wider between her eyes and the upper part of her jaw. One annoying aspect was when her nose started to leak, moist with the development of excessive mucosa. It felt damp at all times, something that Michelle had to get used to.

Still, Michelle was sure without her fully feline skull, her sense of smell would not have enhanced in the way she might have expected when fully formed. But she was certainly aware of odors in the room, the ones from her own body as well as perfumes, items, and even some aromas that had escaped her human notice until now. It left her elated as a preview of what she would experience in a few short days, the world through a literal panther's nostrils.

Staring at herself in the mirror for more changes, Michelle was not expecting a gleam in her eyes to begin to show. It was a dull, yellowed shade, akin to the beginnings of jaundice as she'd seen on an elderly relative at one point or another. But, soon, the yellow started to overtake her iris, spreading in a pooling shade over the entirety of one eye, then the other. The sight of it was akin to watching a pitcher of juice being filled up. Though her eyes were white if she moved her head, Michelle was aware the yellow irises took up much of the space. Her pupils seemed to be enlarging, too, as the moments ticked past, rounded in the light of the room. It was almost alien watching her eyes turn feline, and she was sure the expression she would make for the cameras would be genuine, one of the benefits of being transformed for the first time.

The altering of her eyes came with more drastic changes, ones she was not fully ready for. It started with an effect on the clarity of the room, as though its contours were much sharper than she was accustomed to. However, she soon found it was limited to a strip in the center of her field of vision, comparable to her human vision along the horizon. That made sense to her, given a more animalistic way of looking at the world, the sharpness of predatory eyes she would need to hunt with. It was delightful to look at the room with literally new eyes, though the next change to come would be a little more daunting. The colors of the room started to wash out, with fewer cones and more rods in her eyes for picking up color. Looking around the room, Michelle was suddenly aware reds and greens were absent, having faded toward yellows and blues and other shades that took her a few moments to get used to. It was a bit alarming at first, though Michelle soon decided it to be par for the course of panther life and paid it little mind as she waited for the next change.

Thus far, the alterations had all been surface level, tissue, cartilage, and superficial alterations The last change to her visage for the night was to be her ears, a tingling spreading from there that denoted their growth and expansion. As though being molded like playdough, the edges expanded, rounded, almost fanning the sides of her relatively small head. Edges overlapped onto each other, and the canals themselves enlarged slowly, widening with veins and ridges that were likely useful in an increased auditory capacity. To match the final alterations to her ears, their innards filled with long vibration-detecting hairs, something she was tempted to rub but ultimately decided against it. She didn't want to damage any aspect of her physiology in mid-change, even if it was to be temporary!

With that, the changes were done for now, and Michelle was left to enjoy her transitory visage before the morning. It was powerfully disconcerting to see feline features on her face, though after a time she grew accustomed to it, thinking it akin to prosthetics. Though these ones would not be coming off her face anytime soon, and would be part of her until the process was over. They were but a prelude of what was to come, as it were, though Michelle was excited and nervous about the results in equal measure.

Getting ready for bed that night, Michelle was privy to the first of many quality-of-life changes that came with the nanite injection. First of all, even in the dark, her whiskers were aware of her surroundings in a way that left her perplexed. Any motion against a dresser or walls made her shiver, almost as though she could feel with them alone. That was a moot point, given that even in the dark of her trailer she could see everything, eyes drawing in light from the outside far more efficiently than her humanity. The scents within her trailer, too, took some time getting used to, though it didn't take too long for them to become part of the background. The sounds of outside, however, with her new ears, were detected with decent acuity, much to her chagrin. Still, she eventually managed to sleep a dreamless sleep despite the excitement of what was to come tomorrow.

It was an early morning, though Michelle found herself wide awake at the crack of dawn, as though her body was prepared for it. Was it part of the changes as she had researched, or was she simply too excited to begin her day? It was almost impossible for her to be sure, but for whatever reason, Michelle got up rested and energized. Breakfast was bacon and eggs, something she normally did not care for, but her nanite-induced changes needed more protein intake. And, the food went down easily, meat not her favorite though something she would be enjoying entirely for her tenure as a cat.

For the next part of the shooting, she was to look at the changes in the mirror with horror, having changed overnight after their first bout of sex. Not sure what to do, she would try to go to a doctor, who would determine the anomaly in her DNA. She was to showcase the alterations to her senses that came with it, something that was at the forefront of her thoughts from last night's exploration. The best acting was realistic, after all. And it was easy for her to act upon her surprise when going through it for the first time. Most of the takes they did that day didn't even require more than one per scene! Looking in the mirror, exposing her eyes and whiskers, going out with sunglasses and a scarf on to try and hide her feline assets all went flawlessly. On set with the doctor, everything was going so smoothly they didn't need to reshoot!

Even as the day wrapped up and Michelle was to go to her trailer, she couldn't help but think about her costar, David. His scenes needed to be filmed separately today as his changes came to fruition. Still, she wouldn't mind seeing him, wondering what he looked like with the same feline features as she possessed. Surely, he was rather hot, even though she found him much already. Though part of her wondered if she should be intrigued by such, there was no denying her fascination with the mental image. Still, she couldn't see him until tomorrow when the next phase of their changes took place.

With today's work out of the way, Michelle was set to wake up with her tail, already fully formed. That being said, it was the growth of the thing she needed to contend with tonight, much to her interest and trepidation in equal measure. Like the changes to her head, she would be allowed to experience its development in the privacy of her trailer. It was equally exciting and nerve-wracking to own an appendage that few humans had ever experienced possessing, and she was eager to get it over it, unable to fully prepare for the experience to come.

After waiting for what seemed like an eternity, a tingling in her spine and lower back seemed to be a sign the nanites were at work within her body. It started as a small bump, one that she could not take her hands off as she tried to rub it into existence. Her efforts were not needed, of course, as the bump pulsated and the bones within her coccyx started to separate within them. It was as though the bones themselves were being painlessly pulled apart, the calcium within them expanded until it made a sizable lump on her backside. Getting more and more insistent against the skin, Michelle worried that it would burst open in a shower of blood and tissue. But, the nanites had different intentions for her, and the bump behind her continued to grow, writhing against her touch at first but soon expanding beyond that to start the beginnings of what she knew to be a tail!

Despite her best intentions, Michelle could not keep her hands off the growth of her new tail, curiously exploring its contours and excited to be present for every moment of its birth. The bump continued pulsating under her touch, and she was sure it was growing, albeit steadily. Part of her longed for a ruler to measure its development, but such would be fleeting at best with the speed it was to grow in. It had to be close to an inch now, the bones having separated and each individual one expanding together, muscle holding them in place as the welt continued to accommodate them.

By now, the skin of the bump was almost painfully tight around it, though the nanites numbed the process enough that she was not ailed by it. The skin remained red as it continued to visibly grow, getting closer to two inches now as soft pops ran through it. Michelle was sure she wouldn't be able to hear it had her ears not altered. It was a bit disconcerting to hear the bones sliding together, the joints popping into place as the growth started to inch outward a little more, and the bump itself showed a modicum of movement. Though for the moment, it could not move of its own accord, that was soon likely not to be the case. The muscles knitting together around the new bones caused a series of ridges to poke from the top before meat and muscle filled in to make it look more natural.

As the minutes ticked passed, Michelle was tempted to caress the growth, though was afraid of its sensitivity against her hands. Having held off until now, the desire to feel the skin was too much, and she rubbed it, its texture coarser than she expected. It was not human, pinker than her normal skin shade, with gooseflesh covering the surface, as though it was getting ready to erupt with a pelt of black fur. It was bizarre to feel a new extension of her body, as much a part of her as her arms or legs. At four inches now, it was still steadily growing, and Michelle could feel the bones and muscle rippling under the skin, making her moan a little from the sensations.

A shiver ran through her spine just then as the nerves within her growing appendage began to integrate, and the tail started to move under her power, waving back and forth from the base. If she concentrated on it, Michelle found she was able to move it herself, as flexible as a limb and becoming more so at five inches now. As it grew longer and longer, Michelle found herself able to bend it in several places, her tail gaining points of articulation as it continued to expand. Micheel found herself rubbing over the edges of it, teasing the rounded end it possessed and trying to discover all the ways it could move. Raising it above her butt in a curved shape, wrapping it tightly around her waist, and playing it up and down was all par of the course with such an articulate possession.

By now, the tingling of growth was nearly done, and Michelle reveled in playing with her tail, loving the sensations it gave her. Though it was still skin bare, the flesh different than her normal skin, that was soon to change as itchiness started to play over the entire length. It was as though millions of hairs were preparing to breach the surface at once. Michelle was hardly prepared for something akin to having just shaved, though far more intense. Soon, the skin started to darken from the peppering of fur as Michelle rubbed frantically, though it was spreading all over her new tail at once, black rosettes blossoming from the skin in integrated patterns as more black hairs lanced from the gooseflesh. Rubbing the hair, the coarse texture soon became soft, and Michelle relished touching it, loving the contrast between the fur over once-bare skin. Eventually, there came a discomfort with her touch, the hairs being more sensitive. A chuckle escaped her lips, wondering if this was why housecats hated having their tails touched, even while doing it themselves.

Playing with her now fully-formed tail for some time, Michelle lost track of the clock. It was time for her to sleep, and get ready for when she would film a scene waking up to the new growth. However, given the unpredictability of her tail and the irritation she felt at having it confined under covers, sleep not coming easy. It took her some time to find a position to get comfortable, eventually lying in such a way that she could leave it hanging out of her bed.

The morning came far too soon, and with it came the next round of filming. The first part was easy enough, waking up with a tail and showing shock over the thing. Michell's character was much less favorable with the growth than she was in real life, and the shock and awe over the growth had to be faked and acted upon. Though the worst part was trying to keep her tail in her pants when trying to meet David, her director thought confining her tail was the best way to display her hiding the changes from others as she made her way to her costar's 'apartment'. It ached intently as she kept it in her pants, and she had to grit her teeth to get over the filming until she could let it out again. It was torture!

In the moment of filming, Michelle felt a sudden compulsion, one that she reflexively acted upon. Whiskers feeling irritated, Michelle reached down to lick her hand, then began rubbing the sides of her cheeks, trying to remove the irritation. Only after the act did she realize what she was doing, a flush crossing her cheeks. Yet the director seemed happy with the action and decided to keep it in the film. Moreover, the camera was required to stay on her at all times, hoping that her natural instincts would allow for some great footage. Being constantly on film made Michelle hyper-aware, and she was sure they didn't catch too much else of her acting a feline. It was out of her power, at least.

Yet, all notions of embarrassment were eliminated when she saw her costar, David, talking with one of the production people. Even from this distance, Michelle could see the same alterations to his form, the feline-like edges of his face too natural to be prosthetics. Whiskers adorned his face, and Michelle could tell from twitching ears and flared nostrils that he possessed the same facial features as she. Even his eyes were feline, though looking small against his still human skull, much like Michelle's own.

Yet, it was the sight of his tail that gave her pause. It was long, swaying behind him eagerly as he talked. It was as though it had a mind of its own, or rather, was reacting to his mood. It made her resent the fact that hers was in her pants at the moment, needing to get used to being confined for the scene to film it. The ache resonated from the base as it twitched in her pants, obvious to anything watching that she possessed one. It took everything she had not to pull it out right there, though Michelle knew the moment it was out that she would never want to put it back in again.

As she approached the man, a strange smell came into her awareness, one that Michelle was unfamiliar with. Though it came with a more familiar sensation, one of wetness within her that was sudden and unexpected. No stranger to arousal, it was the fire in her loins that made her infer the scent was coming off the male. No, David, she tried to rationalize with herself, wondering why that mental slip had occurred in the first place. Was she changing in mind as much as she was in body already? Still, as the odor grew in intensity the closer she got to her costar, it was harder to think of him as anything else but a male to quell her heat.

The obvious advantage was it allowed her to get into character, to immediately cling to the man that she wanted so desperately to fuck her. No stranger to sex, Michelle found it was not demeaning in the least to be so needy in front of the changing man. Given her role and the instincts she deemed came from the nanites, it was easy to act the way her director needed her to. David, on the other hand, seemed to have much more difficulty in his actions, knowing he needed to resist sex though was barely able to. He would as soon pull down his pants and take her then play his part and try to have them both resist to 'prevent' the changes. Though in his way, it made him play the scene well in his own right, body unable to resist as the mind screamed at him not to give in and damn himself.

It was during their scenes today that David's character was to explain to Michelle about the Were-Panther curse, and how it activated between two people with the recessive trait. The sex they had prior had triggered the tail and facial alterations. The changes would slow down over the course of the next few days and even revert if they abstained from sex for a time. But the sex drive, as they could both attest to, was enough for them to change more and more, the process being permanent if they eventually succumb. And, the more they had sex, the more their bodies craved sex, to the point that it would trigger the curse to take its final form. Several times having sex would be enough to solicit further changes and make them permanent, giving the pornographic aspects of the movie that would appeal to the target audience. Michelle wasn't exactly sure the semantics of the curse made sense, but it would certainly appeal to the niche audience that enjoyed that kind of smut. And in making the film, Michelle was certainly starting to understand why!

Yet, even with that knowledge, her character was supposed to beg for it, needing sex and not able to quell the hunger that was eating away at her mind. And, although there were repercussions in the world of the film, none would plague for her partaking in pleasures of the flesh. Save for being exposed to all of the film crew, that was hardly a deterrent for her to enjoy herself. With nanite transformation technology, it was even safer; there was no chance of any diseases being caught, largely eliminated by the technology in society as a whole. And, she was sure that in mid-change she would not be able to become pregnant, making protection unnecessary!

With that, she took the panther man in an embrace, kissing his lips and grinding up against him, running her hands up his shirt. What she was not expecting was the soft texture of panther fur to meet her touch, something she was somewhat familiar with from feeling it on her own tail. Though while her body remained devoid of hair, his was luscious, soft, and pleasant to the touch. Michelle thought she heard something akin to a purr in his tone, though wasn't feeling a vibration from his chest or anything of the sort. Why the nanites had moved his changes passed hers, Michelle had no idea, but she wasn't about to question it, wanting to continue to rub at it, maybe feel it pressed up against her own chest. Moreso than that, however, Michelle wanted to grow her own coat, desperate to feel it against her hands as she stroked it!

With that, the pair pulled down their pants, grinding against each other as David's penis teased around the fringes of her sex. She wanted to pull him in and make love standing right there. However, there was a more pressing need, something that she wanted to do instinctively. Part of her wanted to get down on all fours, to present her sex to him and raise her tail, more like the cat that she was becoming. And why shouldn't she, given that she was changing and mentally becoming more the animal that the movie would have her be? It would make for more accurate filming, she figured.

Stripping off her pants and panties, the scent of her wet heat burned into both of their nostrils and Michelle moaned, an aching need to be taken and penetrated. "Take me!" She begged, a natural reaction to the heat that she had been subjected to. Her tail moved back and forth in insistence, hopefully wafting the aroma of her scent in David's direction. Her reactions were genuine, needing sex as much as her character in the film would, the nanite-induced estrus making it easy for them both to play the roles presented to them.

David was on her in an instant, eating her out and making her beg for more. His tongue, while too moist and human, was still hitting the right spot for her, teasing her over and over until the orgasm started to roll over her. Never before had she experienced such an intense orgasm from oral sex, and it was impossible for her not to cry out her ecstasy, begging for a thick cock inside of her.

Skillfully, David lined up his cock and thrust it forward, penetrating her sex and making her shiver on the heels of an intense orgasm. Like his tongue, his penis was eager to press against her clit, pounding in and out enough to open her insides. The pressure was perfect for her, bringing her back on track for a second release. Be it David's skill or the scent of his feline changes in tandem with her heat, it was certainly doing it for her! Best of all was the sensation of his firm hands gripping her back, his own chest against hers as his soft chest hair rubbed against her bare skin. Michelle was elated!

Yet, the more he fucked, the smaller he seemed to get inside of her, as though his cock was deflating within. Pushing back against him in an effort to keep him hard, Michelle was eager for the sensation of him cumming within her, a primal need that would not sate her heat until it was felt. To her excitement, however, the penis was still erect, though not the same size as his humanity. She wasn't sure how that was possible, though, in her heat-fueled lust, there was little care for it, needing the stimulation to get off more than at any time she could recall.

It was a tingling heat in her own sex that made her perplexed, taking her from the edge and preventing her from receiving the much-needed orgasm. At first, it seemed to be getting tighter around the male's cock, making her eager to take it deeper. Even if the length of the shaft within her had shortened, it was still enough to do it for her, as though her own sex was shrinking to match it. Though difficult to fully fathom with her thoughts hazy as they were, it was as though her sex was becoming shallower, that the phallus within her didn't need to reach so far to hit her sweet spot. Such should have been impossible for both her sex and her mate's within her to be shrinking. Were they perhaps changing in sex to match their panther forms? After all, sex was the catalyst for change in the movie. And if they were being filmed in every sex scene...

A sharp pain resonated through her cunt lips just then, as though she was being speared with dozens of tiny needles. Each time her male thrust into her, the same waves of pain struck her to the point that she was forced to growl out. Her sex seemed to be overly sensitive to the intrusion, as though she was being fucked with a phallus covered in tiny spines. Yet, she was hardly in a position to complain about the aches, given the heat she was in and how wet and moist her sex was. And there will still be that need to take the man's cum inside her, even over the pain that his penis was currently giving her. Thankfully, the more he pounded, the less aching his member gave her, especially as his thrusts started to intensify and he prepared for his end.

Despite the ache in her sex caused by forces she was hardly able to understand, Michelle couldn't imagine anything better. The sex was more primal, more bestial than anything she had felt thus far. Part of her had hoped it would feel like this, that she would crave sex so bad and give in even when her mate cared not for her pleasure but his own release at the behest of her heat. She was completely absorbed in the sexual act, even through the pain and discomfort she now loathed, finding it was simply so good and animalistic.

The slick slapping sounds of their sex increased in intensity as David moved to reach his end, and with it, Michelle felt her second release growing closer and closer. She hoped to get off before he did, and the sheer force of her desire was almost enough to allow her to do so. The orgasm was building so fast, especially after the tightening of her sex around the male, and, soon, the ache of his spines almost became sensual. It was getting to the point where she couldn't hold back and didn't want to with the intensity of her estrus. David was to cum first, grunting in a more primate tone than the feline he was becoming. Yet, it was still immensely fulfilling to feel a small splash of semen sitting warm inside her. The thought of it was enough to bring her to orgasm as well, milking his cock for the minute amount of semen it provided even as David struggled to pull out. Her sex was apparently designed to keep a male inside!

The pain of David pulling out made her growl, and Michelle had the notion to turn around, almost glaring at him for the act. Though reflexively taking a look at his groin, Michelle was shocked to see a much smaller penis than the one he'd had prior. It was pink, the tip tapered and the foreskin had peeled back, though was presently moving to cover his shaft as it deflated. Of most note, however, were the backward-facing spines that seemed to adorn the surface. Those had to have been the cause of her pain, a facet of feline anatomy. She hadn't been expecting that to happen during sex, as painful and amazing as it had been in real time. Had the nanites had been programmed to change them during sex? It was certainly an interesting coincidence to happen during their filming otherwise!

With that, Michelle was prompted to look down at her own sex, a little shocked that its contours were different. She rubbed the inside of it, not caring if everyone was watching or she was being filmed. She wasn't sure how to describe the changes to her sex, not without careful examining of it in her own time. It was at least in the same position on her groin as it had been, much as David's penis was for now. She was sure it was supposed to be moved back along her perineum, but for the moment had not altered that far. Her shocked expression was likely good for the film crew, so she allowed her self-exploration to continue. All the while she resisted the urge to look at David's cock, turned on by the notion of what it looked like. He was likely looking at his own member, in the same way, stunned by the unexpected alterations their sexual intercourse had caused.

With the changes to their sexes, Michelle found herself wondering how the aftermath was to be shot. Apparently, getting footage of her rearranged sex and David's feline cock wasn't essential, though having them come out of coitus with panther parts was. They were supposed to act disgusted, ashamed of the elements that made them more like panthers and the failings that had led to such disgusting consequences. And they still had a scene to shoot, especially the ones of anger as David's character forced her out and told her to never come back. It felt a little stinging to be dejected like that, though Michelle was able to rationalize that was part of the script and that she should harbor no real feelings toward David. Save for using him for his essence, something that she also had to quell, given the pervasive panther instincts welling in her mind. A conflicting cocktail of emotions, indeed!

With that, she was left to her trailer to wait for the morning's filming, when the next series of changes would occur. Their directors seemed happy with the shots they had gotten, the sex seemingly so intense and genuine that it surpassed all other pornos they had worked on. There was every chance, at least from what Michelle could gather from their murmurings, that the film might gather more attention than just the niche target audience. And with it, the promise of a bigger royalty paycheck!

Michelle could hardly focus on such things at the moment with the memory of their sex fresh in her mind. Part of her didn't even want to wash David's sperm from her sex, wanting to keep it inside of her to fertilize...what? Surely, she did not want to be pregnant and did not want to birth children or cubs. She couldn't anyway, not with the nanites programmed into her. Though it was impossible to deny the need burning into her loins, not only for the stimulation but for the precious seed to be gifted to her. Never before had she felt such raw sexuality before, and it was powerfully elating to think of what was to come next as the filming continued and her changes came to fruition.

Still, there was one thing she was quickly coming to regret as she sat in her trailer alone. It was almost maddening to be without a male in her moment of heat. Though it certainly made the sex scenes more realistic, it was difficult to wait in the interim for the next mating. Michelle was aware that feline heat needed constant attention to be fully quelled, but reading about it was one thing. Experiencing it was another matter altogether. That precision of his prick, painful though it was, had been burned into her mind to the point she could imagine wanting nothing else. If only he was allowed to come to her outside of filming! Would he even dare be down for such frivolity?

As the hours passed and sleep became impossible, Michelle decided there was little to be done about it, save for breaking down David's door and begging he take her right then and there. That not being an option, Michelle's only reprieve was to touch herself, reaching down to stroke her bizarre hybrid anatomy. Opening it up revealed a vulva that was not the same as she possessed as a human, lacking the familiar pearl of her femininity. It was still present, thankfully, though slightly shifted to a position that might trigger orgasm and ovulation from a panther's penis. No stranger to playing with her own sex, Michelle was still shocked at the sensations flowing from her lips as she teased them. Though she was in heat, needing stimulation above all else, Michelle was disappointed to discover that her touch had little effect on satisfying the ache in her loins. It helped somewhat, to be sure, but there was something else about her need, even as she explored herself, that was obviously missing. Be it the male's barbed phallus, his weight on her back, the sensation of semen in her womb, or even the mere scent of his male musk, touching herself without a male present was simply not doing it for her. Still, several orgasms in, she was finally tired enough to rest, even if it wasn't as fulfilling as she might have preferred.

Before passing out, Michelle couldn't help but think about how she would deal with the curse had it been real and not artificial like the technology within her was programmed to simulate. Surely, she would not be able to resist the siren song of her sex and would make the change permanent. She didn't want to be an animal forever, scarcely able to see herself that way for the rest of her life. But there would be little chance of resisting, even if she was determined to see it through. The heat her body was in, while not enough to change her, still plagued her mind, making sleep almost impossible. At least after the next round of changes, she would be able to mate again!

Eventually, the sun rose and a fatigued Michelle made her way to the set for the next shoot. Makeup could hide the blackness around her eyes, though in the end, her director decided it was best to leave her face as it was. More natural, as he called it, though Michelle could hardly muster up any anger towards the sentiment. So, she went into the filming as she already was, for once not ashamed of her appearance and eager to get started with the next set of changes besides, set as a consequence of her mating the day before. She would be forced to watch some of them in the mirror as her face began to alter further, losing her humanity in a bit of a horror show. This was not a part she was looking forward to, a transitory effort before the final scenes took place, and she became a cat in full.

Given the timetable of the change, her crew was ready with filming equipment to catch every usable second. The nanites would alter her at any moment, and she braced herself, looking in the mirror for both confirmations as well as for the film crew to get as much usable footage as possible. It was an ache in her dentures that drew her attention to the next set of changes, as though her canines were becoming loose, preparing to fall out of the sockets. Though she was aware of this to be a part of the process, it was still akin to a nightmare, one where her adult teeth fell out as though cursed with some sort of illness. While she knew the nanites were safe and that such things were not to plague her in the long run, it was still unnerving, to say the least!

Thankfully, the process was bloodless, with her human teeth coming loose to the point where she wanted to run her tongue over them to knock them out. Though she resisted the urge, wanting to wait for it to happen naturally, it took all her willpower to do so. Eventually, her canines fell out, followed by eye teeth, and eventually premolars and molars, leaving her gums toothless and giving her a horrific appearance. Holding the discarded teeth was something that did not sit well with her, the conclusion of her worst nightmares come to life. Even the knowledge that cat dentures would grow in eventually did little to deter her disgust over the process.

Though Michelle knew that her teeth would soon grow back, there were other alterations that had to take place in order for them to fit. Changing one's species was hardly an easy affair, especially in the gradual way the technology provided. She knew that her skull would have to alter to be better able to accommodate the teeth of an animal and that it would prevent certain human enjoyments like speech. Such would make it harder to articulate her lines, but that was the point of this part in the film. She would have to use body language and pheromones to 'seduce' her mate, though it would literally be everything he had not to give in right then and there the moment she walked on screen!

Left to stare as the tingling ache of her jaw signaled the next stage, Michelle was still not expecting to see her mandible and maxilla pushing out in equal measure. It was painless, as with all the changes, though still disconcerting to see her face press outward, the beginnings of a muzzle long enough to accommodate the teeth that were starting to grow. Her upper lip and nose soon became more in line with each other, losing the more angular position found in her humanity.

Eventually, she could see the beginnings of her snout in her periphery, looking more in line with a cat than the human visage she was used to. Though not fully formed, it seemed large enough to support her soon-to-develop teeth. Breathing was somewhat easier, and the scents in the room were amplified somewhat, with her increased rostrum evidently able to take in more scent molecules. She was barely able to comprehend what she was smelling, brain not ready to process things in a way that was meaningful. So, Michelle was left dizzied by the smells in the room, adding to the air she was putting on from watching the changes and receiving praise from her director, something she was barely able to accept in her stupor.

At this point, Michelle was staring intently into the mirror, waiting for new teeth to erupt from her gums. Yet, it was not her teeth to change first, but rather her tongue, tingling and flattening in her mouth. Michelle was still thankful for that, its smaller, fatter state not large enough to fit her new larger jaw. The most notable alteration was that her mouth started to dry out, as though stuffed with cotton balls. Though she could not tell at first, the entire surface of former taste buds soon erupted with hundreds of stunted spines, a thick carpet that would make feline grooming a breeze. She was only aware of the full spectrum of alterations when rubbing her tongue against the roof of her mouth, the sensation almost painful when she tried. It was bizarre, though intriguing enough that she kept doing it to grow accustomed to the sensation.

That seeking tongue soon detected tremors under the gumline, the sign that her feline dentures were soon to grow in. Not wanting to see herself toothless any longer, Michelle was thankful when the tingling ache of new, feline teeth started to take hold, pushing bloodily from the gums and filling her with that tangy, familiar taste. It was her canines that came in first, almost long enough to brush her lower gums from a wide open mouth, hanging almost heavily on her face. Incisors were next to grow in, thinner than human equivalents and more numerous, filling that front space between her two piercing canines. Molars and premolars filled out the rest, sheering edges made for an all-meat diet.

To her chagrin, however, Michelle was soon to learn that this set of changes was not to be done with her yet. Though her whiskers were sat on cheeks that were puffier than she was used to, they were soon to be joined by a series of itching as dozens, hundreds of hairs erupted around them, the start of a feline coat that would soon cover her entire face. It almost looked like a spreading disease, the skin pinker for a brief moment before the blackness of short hairs took her. They covered her skin like a forest, leaving no skin visible as they moved up her cheeks, running faintly over the bridge of her nose and around her eyes, the itching causing them to water slightly. Soon, the backs of her ears, her chin and cheeks, and the front of her face were covered, the fur running all the way up to her blond hair, creating a stark contrast.

That was not to be the case for much longer. An intense itching started playing over her scalp, and Michelle was sure that her own hair would shrink away to comprise the rest of her feline scalp. She was shocked to learn that was not the case as the hair started to loose from their sockets, falling out in clumps around her. It was akin to losing them to illness, to the point that it was almost enough to bring her to tears. Of course, Michelle knew she was to be rid of her hair in one way or another but to lose it in such a way was drastic. Soon, all of her revered, lovely blond hair had fallen from her head, leaving only a bare scalp with a ring of panther fur to signal its replacement.

It was not to be the case for much longer. The persistent prickling was a sign that the bare skin was to sprout a matching coat of panther fur. Having wanted to look away, a hairless visage not something appealing to her sensibilities, Michelle was nonetheless curious to see the bare patches fill in with panther fur, the visage off but not as bad as being bald, she reasoned. The skull shape was largely the same, looking off with her muzzle in its current state. A horror movie monster without makeup, in some sense. Michelle had to admit, it wasn't too bad, all things considered. And it was only just past the halfway point of change!

With that, the shoot was over for now, and she was given a reprieve to get used to the changes before she was to go out and scare some passersby as part of the next scene. She would not be changing anymore today, thankfully, and she was glad of it. The program was able to affect the speed of her changes in a way to fit their filming schedule. Playing with the new alterations, the first thing she realized was that, while she still possessed a human larynx, her altered throat and especially her changed tongue and teeth were making it impossible for her to speak in a way she was used to. It was unnerving to play with the timber and pitch of her voice, the resulting sounds barely articulate. She resigned herself to the loss of her voice for the time being, hardly the worst human trait she was to sacrifice before the change was done with her. They would have to switch to narration she would record after the fact while her efforts to talk were rendered moot. With her hands able to gesture, she was at least able to communicate her intentions. The filming directions were skilled enough that she didn't have to ask any questions about her directions for the rest of the filming process.

One other ill came to her attention as she went to lunch, the scents of food served not appealing to her sensibilities. She knew it would happen soon enough but was not prepared to have to eat raw meat just yet. Her nose knew, however, that it was time to try, and that her altered pallet would be able to acclimate to it. She didn't even have to ask, thankfully. One of the servers had experience with preparing meals for zoo animals and had hunks of steaks barely cooked ready for her. The bloody mess would have made the human her retch, but her altered taste buds didn't find the flavor offensive, as much as was left in comparison to her primate pallet. It would constitute her meals for the next week or so, and after doing it for the first time, Michelle figured it would be OK moving forward.

The day's filming was easy enough with the instincts in her mind that naturally compelled her to act like a cat. She was caught grooming herself on more than one occasion, the cameras forever on her for any such moments. Licking her hand and rubbing her face with it was one habit she couldn't break, and figured there was little point in trying any further. It was not the only thing she was expected to do on set that afternoon. Chasing down and roaring at someone on the street was supposed to be the result of someone running into her. It went against her instincts to do so, wanting to slink away rather than be aggressive. But it was certainly fun to scare the guy, her present fangs eliciting a fear she could almost smell!

The day done, Michelle was left to go back to her trailer for the last night and await the morning. Looking at the script, she was aware that the next thing to change was her hands and that she would lose all her tactile abilities. Hell, she wouldn't even be able to flip the pages of the script to see what was next! She would also have to be relocated to a habitat with the male, her costar, though such might be welcome with the ache in her sex and how simply sublime it was to get her her feline cunt lips. Pros and cons of the situation, she reasoned. It still didn't make the fear of losing her hands any more palatable.

The morning came all too soon and with it the time to film where she was to gain her panther paws. Michelle found herself clenching and unclenching her hands in reflex, wanting to feel the fingers move while she still possessed the ability. The nanites could trigger at any moment, and the cameras were on her, any natural fear of losing her hands making prime footage. She was sweating, nervous, knowing that any twinge, any tingle could mean the start of her next change.

She would not have to wait long, given her familiarity with the sensation of change. It started with her fingers, light cracks echoing in them as they started to stiffen and shrink before her eyes. The process was gradual, though not enough she couldn't notice them diminishing. Her ability to move the joints underneath was being robbed from her, and that terror of losing them was brought to the forefront of her thoughts. However, there was nothing to be done about it as her fingers retracted steadily, losing their mass, stature, and mobility. By the time they were done, all that remained were barely motility nubs that she tried to twitch in vain. The worst was when her thumbs were pulled up with her wrists, diminishing and stuck away from the rest of the digits. Their thickened state was a testament to the size her paws would eventually reach, far larger than any house cat she had experienced thus far.

An ache in her nails prompted her continual stare as the nails popped off, the skin retracted and separating the layer of tissue between them before they loosened and fell unceremoniously to the floor. It was unnerving to see them go, all ten of them at once, but thankfully the process was mostly painless and bloodless. Still, it left a nice bit of body horror for the film, likely the purpose of making it happen in such a way.

Waves of pressure started making her feel uncomfortable as what had to be feline nails started poking through the tissues, sharp enough not to to make it completely nerveless. The points of translucent crescents poking through the tips of her nubs made her wince reflexively as they poked their way through. Her facial expressions were on point for the character she was playing, leaving her looking absolutely admonished by the realization she was to gain feline claws. New joints from within pushed them outward, as though they were meant to remain in their rested state. She could feel the muscles tensing to force the claws outward, sheaths of skin forming to allow their contours to stay sharp and deadly within her. Several inches of claw pushed from each digit, impossibly large on human features as a testament to the eventual size that her paws would reach.

With that realization in mind, her hands tingled with the start of their growth, the skin swelling around to the point where they were almost heavy on her still-human arms. She realized with some certainty they were growing to full size in this go, comically out of place on the relatively human body. They were easily twice the size of her human hands in mere minutes, puffy against the skin before taking their final shape. The skin was thus far bare of fur, though it was starting to pepper across the backs of them, making her wish to scratch, though she lacked the ability to do so any longer. The skin of widening palms soon became coarse and firm, darkening to black and swelling with firm skin underneath. The formation of skin around palms and fingertips took on the familiar visage of feline paws, black fur spreading between them and cementing their formation.

Michelle looked down at them with a mixture of awe and fear at what had become of her hands. It was one thing to admire their size and shape but another to experience them on her body. They were clumsy and unruly, and their uses were largely limited for the human affairs she was used to. She would have to have someone open doors for her, would struggle getting to bed, wipe herself, and be unable to brush her teeth, something she lamented with her now all-meat diet. Oh well. It was par for the course and something she was sure she would get used to, or at least have to force herself to.

Although she was experiencing the fear of losing her hands, there was a horniness that came with it that she was unable to avoid. It was getting more and more insistent as the moments ticked past, and she was quickly worried about the lack of ability to touch herself. Thankfully she was soon to shoot another sex scene, and it would not be an act for her to beg to take the male's cock. In the film, it would be the sex that changed them further, but her desire was a real one and came with freedom from the film's repercussions. And, she was eager to see what had happened to David, the mental image of what he might look like making her wet and surely releasing a pungent scent enough that even the humans could detect it.

Anticipation at its epitome, she was still not expecting to see David naked and covered with fur as he walked on set. His entire pelt had grown in by this point, hair even having fallen away to make room for his panther coat. The sight of which had her elated, wanting to bend over and feel the fur against her skin as he fucked her senseless like the animals they were. Of course, he couldn't wear clothes, but Michelle would have it no other way. It only made her more excited to get her own fur coat, almost to the point she could hardly wait!

As David walked toward her, the full extent of his changes became obvious. His stance was awkward, as though his feet were too misshapen to balance on. His legs were still in their human configuration, though like her hands, his feet had completed their transition to their feline paw state. It made walking precarious at best, and Michelle was thankful her own feet had not yet changed, though eventually wanted to be down on all fours, feeling awkward in this hybrid state.

Unfortunately, this scene was not to be a sexually active one. The pair had a conversation, one-sided as it was, where David decided they should avoid seeing each other to prevent the changes from taking over. The change, he explained, might revert in the coming weeks and months if they resisted orgasm. His penis was at erection all the while, likely at the scent of her heat, making the scene all the more realistic. Thankfully, they were to film the more intimate scenes that day, after lunch. Michelle couldn't her mind off him, thankful she would not have to wait long...

In the film, Michelle's character couldn't wait, unable to touch herself with paws and needing it so badly to be fucked. The panther need to be bred and impregnated was too strong for her to fight, and the nanite-driven instincts provided her gave her enough characterization to play the part flawlessly. As was in the script, Michelle would not stay away, and the two of them would not be able to resist each other as they approached, panther instincts at their apex. They were allowed to improvise the scene, and with the truth in their changes, what they did naturally was likely to be far more effective than anything they could possibly script. David's character had some banter prepared, telling her to get the hell away and the like in an effort to save his humanity. But, of course, his penis was at attention, and there was nothing to be done for it other than give in to his animalistic urges with enthusiasm.

With that, Michelle went over to his bed, raising her tail and rearing her back legs in a way that would allow her to be taken like the cat she was turning into. There was no foreplay, no romance, just the simple bestial need to fuck and quell the urges playing insistently over her mind. David was courteous enough to lick her cunt lips, teasing over them and sending shivers through her entire body. It was amazing, but even that brief tease wasn't enough to provide much pleasure. She wanted the penis inside of her and she wanted it now.

"Rrruck Meeee!" She tried to call out, the words articulate enough to be understood by the viewer's ears. David took the hint and got on her back, spearing for her cunt lips with his feline prick. It was a little difficult with their hybrid anatomies, loins not lined up in a way that made it a little awkward. Still, with some effort, David managed it with his smaller panther penis, and with some effort, he was able to get it inside and stay there before he began his frantic thrust to give them the release they needed.

Despite their previous experience, Michelle was not expecting to feel the sensation of David's penile spines rubbing against her insides so soon, painful and making her yowl out in a very feline-like cadence. It hurt on the exit, in a way that was almost unbearable. How cats did this as frequently as she knew they did, Michelle could barely say. But such was her reality now, and there was little to be done about it in the middle of the act. And as much as the exit hurt, the thrusts back inside were too much for her senses, making her cry out and satisfying her cravings in a way that no past sex could manage to simulate. It was heaven for her to be fucked in such a way!

Getting into the rhythm of the mating, Michelle was remiss for not noticing the tingling of change at first. She vaguely recalled that she was to lose her legs at this juncture, and relished how it would help her take this male's phallus with more ease. But it was still a little unnerving to feel her calves compressing, thighs being robbed of their fat as her heels stretched to make room for the eventual paws she would possess. Her hips widened, pushing into the flanks of her belly with a thick line of loose skin like the cat she was becoming.

It was not the only change to occur to her backside as the ache of sex seemed to resonate toward her pelvis, as though the penis itself was pumping the changes through her. Her pelvic girdle, for as much as she could process through the sex, was pulling apart, separating, and changing the location of her cunt lips. The force of it expelled her lover, in opposition to what her cunt lips desired. Through the repositioning of her pelvis, its forward orientation moved her lower intestines, anus, and cunt lips toward a more feline configuration. She could feel her hip bones shifting harmlessly through the skin, enough to have her thrust backward with more feline anatomy eager to take the male's cock inside her. At the time, she did not concern herself with the realization of what it meant to lose her ability to stand erect. She simply relished the fact she could be fucked more easily and pushed back against the penetration, eager for the small gift of cream the male could grant her.

With his easier access, David plowed into her cunt lips with abandon, no mercy for her abused sex and no consideration for her comfort. Such was the way of animals, and it was certainly the way she preferred to be taken now. It was everything she needed and craved, building her pleasure to the breaking point and beyond as she came, feeling her lips clenching on his cock and holding him in place as he came as well, the damp recesses of her sex taking his feline cream inside. Even the painful exit was largely ignored with the bliss of knowing that she had taken him, that she had ovulated, and that...there were those damned thoughts about having cubs again! The instincts given by the nanites were certainly potent, it seemed!

The consequences of their sex, though rather generated through the nanites, were soon to be felt as David pulled out of her, and she tried to stand, realizing that she could no longer do so. Falling forward awkwardly, Michelle was thankful for her paws as she tried to stabilize herself. Her hind feet were not ready to support quadrupedal movement, though she tried with it, her arms not there but legs and pelvis ready for it. Walking was slow and cumbersome, but she was able to manage something workable, if not the most functional.

The original goal was to have them take the day off after the sex to rest and film the next scene in the morning. But that script-writing did not take into account feline mating desire as well as their improved physiological abilities and stamina. It was a wonder they didn't bite off the producer's hands for not letting them fuck again almost immediately! And since the nanites had the potential to be readjusted in their usage, it took only half an hour to get ready for the next scene, though, to the two needy panthers, it might as well have been a lifetime. Panthers could go back to back with little reprieve, and it was maddening to be kept apart when they wanted to fuck instead!

Michelle was used to the sensations of feline sex by now to the point that the pain of it was of little consequence. The changes, too, were something that she was not only accustomed to but longed to feel. It was even familiar to have her toes clenching, pulling into the lower part of her feet as her heels stretched to merge with the shortening calves and gave her a proper quadrupedal stance. The same slight ache of nails preparing to pierce forth was proceeded by the dislodging of her toenails. They flexed forth, though Michelle hardly had the cognizance to work them, given her sexual escapades still ongoing. She was only vaguely aware of the swelling of paw pads under four of the toes as well as the base of her foot. This time they did not feel heavy on the back of her legs, as her leg muscles were sufficient to hold them on her anatomy. The loss of her large toe was barely felt or noticed, though she could sufficiently clench the remaining toes as she prepared to take the male's seed inside her once again.

The mating act was as brief as the changes to her form, as though her body was deliberately waiting for them to complete before it was time. She was sure David's must be as well, though she hardly had the wherewithal to look back. She was aware of his presence on her back, as though he was trying to rear up in an attempt to bite and claim her. To David's credit, he did get close, but it was not nearly enough to make a proper go of it. Still, it was nice to feel put in her place as it were, allowing Michelle's orgasm to overtake her and fill her with that wonderful sense of contentment from sex she had come to love.

Michelle had trouble walking after that, her shoulder girdle had not quite changed yet. However the stance wasn't too awkward, and she was allowed to be taken to a place that was more suited to her needs, albeit one away from David. She would have been taken by him again and again if they could, but such was a little taboo outside of the set. Her lodgings were a cage of sorts, small, and contained creature comforts meant only for a cat, but that would be her for the next several days, so she was forced to endure it. Eating was a messy affair without hands to clean herself, though even without fur on the backs of her hands, she was able to lick and wipe the remnants of her meal on them, to her satisfaction. Using the bathroom was more of a hassle, unable to use a toilet or indoor plumbing and having only been given a litterbox of sorts to squat in and relieve herself. Such, too, was an unclean affair, though one she was forced to deal with and thus made do.

As per the script, there were only to be three more sex scenes, and with panther stamina, it was likely they could be finished all in one day. The nanites would only need to keep them as full panthers for a couple of days before it was time to revert, making the experience unique, likely one of frivolity, she was sure, nothing to do but mate, sleep, and eat. Well, if she wanted to be in the cage with David, that was. Surely they would be allowed to make that choice once they were changed, right? She would certainly make that choice if given!

Sleep came difficult, the heat giving her trouble without the ability to relieve it, given the state of her hands and the lack of a male. But she was able to manage it, something inside of her content with the semen that had already been planted within. There was something to be said for the sex she had previously, a flame to light her candle that allowed her some reprieve enough to know it would be finally sated soon.

Morning came all too slowly, and she was up and ready to get to work with the shoot. They would essentially fuck themselves into panthers in one last extended scene, pieces of which taken from the last few times they had sex. Michelle couldn't help but think the whole thing was for her own gratification but was in no state to complain, given her lust and her need for the changes to complete themselves. Her enhanced hearing picked up a comment from one of the crew that they looked like panthers from behind at this point, save for the fur that she was largely lacking. There was a sense of pride in the comment, finding more appeal in her panther body than even her humanity. She was hardly average, but her humanity was always something she found meek, desired only for what was between her legs. But now, as a panther, she would be revered for the beast she was, respected for her prowess, and desired only by what she considered was a worthy mate!

Naturally, when it was time for them to mate, Michelle was all panther in her actions, no longer bothering to act like a human. There was no need with her animalistic form to act any other way, and David was on her at once, licking her cunt lips with that fabulous feline tongue before getting on her back and spearing for her cunt lips. Eager to take him inside, the white-hot burning of his spined prick was only just enough to distract her from the next series of changes. The familiar tingling started to play over her head, and Michelle figured it her skull was next to alter, giving her a fully panther appearance. First, the bones started to flatten from a rounded primate skull toward the more streamlined shape of its feline equivalent. Cheeks puffed further up as her forehead sloped, compressing on her brain and leaving her thankful she would retain her human self. The nanites would see to that, and Michelle wanted to experience the change from the perspective of a human while essentially being a cat. The alterations to her skull allowed her occipital holes to increase in size, making her feline eyes finally comfortable. A thickened neck and firmed muscles rounded out the changes, allowing her the bite power she needed as a cat. Not that she would be hunting her own meals, but it was still impressive to possess regardless!

Effectively by this point, Michelle was rendered a panther from both ends, something she found a little surreal to be in the throes of. Her chest was out of sync for the moment, and she lacked the fur to mark her as a true cat, making her at first appear ill. Of course, the lack of a feline's chest would make walking precarious, but not something she relented too much, knowing it would come sooner or later as she was continuously fucked into a cat.

All those thoughts were fleeting with each thrust as the male found his place inside her and gave himself over the instincts of a cat. He, too, was changing, and with the new flexibility in her neck, she was able to turn around and see what was happening to her mate. His chest was barreling, pushing outward as his shoulders cracked and pushed within his flanks, widening with the stature of a panther. Belly thinning and stretching, he had to scrabble backward as his configuration was pushed a little longer than what he was used to as a human male. But he managed it, pushing in and growing closer and closer to the orgasm they both so eagerly sought.

Soon, the force of his pounding brought Michelle's cervix to bear, causing rippling waves of orgasm to flow through her being and her cunt lips to massage his penis into coaxing its load. Lips full of warm cum once more, Michelle felt her thoughts floating away like the semen in her womb. She loved it desperately, the feeling of being filled and fucked beyond anything her human being had ever understood. And it was hardly a drop in the bucket to know what was coming and how much she needed every experience toward that inevitable end of...what?

There was little time for her to reflect on such things with how close their next mating would be. Michelle would have yowled her desire to be fucked once more. They were told to wait between takes, the director and crew wanting to get it right as there would be no do-overs. It was almost maddening a wait knowing that a feline's refractory period was shorter than what they were being forced to endure!

The next mating act was to come soon enough, Michelle no longer nervous about what the changes would entail and more excited to be a full cat in body so that she could function in this new form. That, and her vaginal lips desperately wanted a male within them, knowing what she wanted and only limited by the male's phallus and the crew mates that needed to get in place to film the changes. Part of her hoped this fucking would grant her the soft panther fur she desired. But that was not to be the case with the slight ache in her chest that determined it to be the source of the nanite's progress. It was her breasts to deflate first, pulling into her chest as their fat and tissue dissolved into nothing. She was remiss for caring about their loss, however, with how much she wished to be a cat and how she could not touch them or have them touched anyway. Besides, their fat and flesh were cumbersome on a panther, after all, and she was happy to be rid of them.

The rest of her chest was soon to alter as well, barreling, stretching, and thinning in some places, building muscle in others. Finally, the pops and cracks of her shoulders pushing inward were enough so she could finally walk in a more comfortable stance the way she was meant to. The trade-off was the lack of ability to rotate her arms in such a way as a human, but it was of little concern with the advantages she would gain in their stead. Muscle swelled within her upper arms, contributing to their potent jumping strength and the power to grip prey. A longer spine, thinning torso, and powerful stomach gave her the flexibility to tend to her own needs should David stray too far. Best of all was the movement of what remained of her breasts downward, another pair underneath them signally the formation of four functional feline nipples, ones that would...no, she did not want cubs, no matter what the instincts kept trying to drill into her thoughts.

David's changes were even more obvious as he gripped her sides, having difficulty with the state of his arms and the twitching of the digits. It was clear he was to lose them with the sensation of them pulling at her skin, and Michelle didn't need to turn around to know that her lover was gaining his own set of front paws. Still, curiosity came to the forefront as she turned to view his fingers becoming tiny, fattened nubs. Wincing through still-human features, he was likely feeling the ache of claws piercing the tips and popping off the remnants of human nails. Michelle had to admit that the rough sensation of paw pads on her skin made things more comfortable than weak human hands, and the male was able to crawl up her back now that their statures were equal, hunched over her as he rutted with the speed only a beast could manage.

With their changes done for the time being, it took them little time to reach their ends, not wanting to hold back. After countless sessions, she was sure it was the best sex she had ever experienced, nothing in the human world able to compare. She wanted this to be her sexual sphere for the rest of her life, even if cats seldom mated for pleasure. Still, with the bestial needs burning through her mind, there was no doubt that these few days of pleasure were exactly what she needed and wanted more than any other man had done for her. She only wished he was able to bite her on the neck, and to his credit, David was trying. Though it was obvious he lacked the fangs to pierce the nape of her neck, and he was left grunting his frustrations, almost pulling out. But, thankfully, it was not enough to deter him from his ultimate goal...

With a fully feline yowl, the male came, screaming his conquest to the world. No longer caring about social convention, and figuring part of her job might benefit from such actions, Michelle let out her own primal scream, something that only an apex predator could get away with in the wild, not needing to keep their rut silent with no larger predators to harass them. They were left to bask in their afterglow, the cameras and humans around them hardly a deterrent to the animalistic sex they still craved even after so many sessions!

At this point, both knew one more fucking would cement their forms as panthers. Well, in the movie, anyway. The script called for some sadness in human expressions, David's in particular, to make the ending bitter-sweet. It was all they could manage, but even that was fleeting. They were supposed to act as though they loved being cats now, and that was largely the case and easy to simulate, being her truth! With that, they wasted little time getting down to their fucking, David not even licking the semen from her cunt lips before preparing to plant it once more. With his still human face, he had more to do on screen than she, Michelle having given into an eventual fate and dragging David down with her. But, more to the point of simple sex, the final changes would grant her the pelt she so desperately wanted!

It started in the area where David's fur was rubbing against her own, wanting to feel fur on fur to truly signal her state as a cat. It blossomed up as beautiful black rosettes, something she could determine easily with feline eyes against the backdrop of high melanin content fur that made up her luscious black panther coat. It spread down over her shoulder blades, itching and making her wish for the ability to scratch. But the discomfort was only momentary with the spread of such soft fur, running from the follicles of her arms now and coating her paws. She had been sweating before her skin had altered, though the potent musk only allowed her to enjoy the mating further. Now her skin no longer possessed the ability, but her fur was left to soak in the fluids as it sprang up over her skin, running between the nipples and down her chest over her thinned belly, the only place where fur was a little more sparse. Rounding out her form, her legs peppered with the growth of her coat, marking her a panther in full.

David's changes had a way to go, the more drastic ones for a man who was only a panther below the neck. Panting in their rut, he wasn't ready for his teeth to fall out, some of them peppering the top of her head and making her growl. But she was able to quell the urge, knowing what would come in their stead. He would soon have the fangs to burrow into her nape, to hold her in place and use her like the panther she was. And she wanted to watch excitedly as his visage stretched into a muzzle, a handsome male suited for inseminating her. Ah, those damn intrusive thoughts again...

Cracks echoed from his head as Michelle watched from her periphery, not able to turn around fully. Still, she knew from experience that his face was stretching out as the bones expanded with the nanites' whims into what seemed to be a proper shape. Tongue already rough, his gums slowly erupted with panther fangs, ones that soon pierced the flesh of the female underneath him and made her yowl with pain and pleasure. It was exactly what she wanted to be taken and fucked in such a way, and she ignored the reshaping of his skull, or the formation of feline ears, caring only that she was to be fucked and given the cubs she wanted...

With a yowl of release, the pair of them were done, David pulling out and once more lapping at the semen he had planted within her. Michelle was thankful for the cleaning, though now she possessed the ability to do it herself. Getting up and shaking herself, she allowed herself to truly feel the panther body she now possessed. It didn't feel nearly as strange as she might have suspected, though she had been gradually brought into it, if not a bit more quickly toward the end. She was a satisfied panther, and a grooming lick to her cheek cemented the bond the two of them shared as mates. Yes, she definitely wanted to keep him close for the next few days they would have to spend as panthers.

Their director, as well as the rest of the crew, were congratulating the pair, though were a little nervous, given they were primates in the presence of an apex predator. But with the compliance and friendliness the two of them let on, some of the crew were even able to come over and pet them, the sensation a little annoying but nonetheless tolerated. The shots, too, were seen as excellent, their director happy with their performance and telling them to take the time to rest, though a few more shots of them in cages as panthers would eventually be needed.

Spending the new few days as cats, all in all, was an interesting experience, not one that Michelle would want to relive necessarily but one that she would cherish for the rest of her life. Being an animal and treated as such was a little below her, though it was the case, given that their crew and handlers seemingly forgot the pair were once human. Thankfully, the two of them were given cages together, not far from each other like the two were really mates. Unpanther-like behavior, to be sure but something that set right with the two of them.

Life as an animal was far from glamorous, if not something to be considered a vacation of sorts. Eating raw meat left no variety to their diets, though they were thankful they were given meat off the bone and not some semblance of highly processed cat food. It was filling but did little else for them, save meet their physiological needs. Their senses were enhanced, of course, but there was little to use them on, given they were in the middle of the set and could only hear and smell their coworkers moving around to get things taken down. Relieving themselves in a litter box, something their senses told them was the right way to dispose of their waste, was distasteful, as was using their tongues to clean their hind ends. Not something Michelle wanted to get used to, though in reality was not as gross as she might have thought, given the cat she was cared little about such things.

Of course, the nanites that put her in heat did not alleviate and she needed the presence of the male's prick inside of her to deal with the pain. It hurt to be fucked so often, cervix rubbed raw with feline spines. But it hurt even worse to be denied sex, to the point that she shoved her cunt lips into the male's nose as much as she dared. David was quick to respond, to the point of exhaustion for both of them on some evenings. His stamina was made to match, it seemed!

All in all, being a cat, though somewhat disgusting, was relaxing, especially with the amount she needed to sleep. 16 hours was the average, and once the needs in her body, digestive and sexual were met, there was little else to do than to sleep it off, something she did happily. Michelle couldn't recall the last time she had rested so well, and it was a nice change of pace from the everyday rigors of life. A literal break from humanity, though if only she didn't have to shit in a sandbox!

In some ways, Michelle found it was almost sad when it was time to turn back, the tenure as a full cat being far too short. Without the slow burn of change required for the film, they could be changed back as fast as the nanite technology allowed them to be. Both of them would be changing back in much the same way, though Michelle cared little about that, a little nervous about the return change at all. But by the time the tingling started and her panther teeth fell out, Michelle found herself eager to be human again, missing her life and interactions and not wanting to be without them for much longer!

Feline teeth gone, her muzzle was left to retract within her skull cranium rounder and expanding for her human brain within. Whiskers fell out, her nose expanded, and eyes watered as she blinked back the color of the world. It was a little jarring to feel her ears lose their ability to move, but there was nothing to be done for it. Dulling scents were missed as well, though she loved having the vibrant world back in sight as her neck thinned and was sure her voice would come back with it. The last thing to change back was her tongue, that sensation of having cotton balls within jarring before her tongue retracted and resumed its human form and taste buds, finding the remnants of raw meat rather repugnant.

As expected, the return change was rather quick, and Michelle was thankful for that, not wanting to be in the hybrid state for too long like with the initial change. Fingers and toes popped out from the thick nubs, claws pulling in and leaving nail-less digits in their wake. Cracks and popes resonated through her form, pelvis reshaping and shoulders widening to allow more primate physiology. Though it was unnerving, Michelle allowed herself to stand as soon as she thought she was able, relishing the ability that had been robbed from her as a cat.

Almost like disrobing, her feline hair started to fall out all over, starting from her head and working its way down as her tail, legs, arms, and chest were robbed of her luscious fur. It wasn't unnerving to be naked, she was used to that from filming previous sex scenes. Rather she missed the warm fur, the air cool on her skin and almost making her wish she could keep that one animalistic trait. In the end, she was left with no body hair, not even on her head or groin, leaving her at least the hope she would grow that back shortly.

The final thing to lose was her tail, and, again, Michelle found she lamented its loss. As though it was being sucked up into a tube, inches were lost from the magnificent appendage before it was entirely removed from her anatomy. In desperation, she tried to wag it one last time, and out of the corner of her eye, she noticed David trying to do the same thing. It made her ponder why humans did not have tails if it felt this amazing to own one. Perhaps a permanent nanite addition was something she could investigate further...

Reversion complete, Michelle was left with some time to acclimate before being called to do the additional, final scenes for the film. Going back to her trailer, she was immediately blinded by the lack of scents, having become accustomed to learning about her surroundings through smell. Worse was the lack of self its loss made her feel without the perfume of her natural body odor to make the place her own. And it was a little awkward seeing herself in her mirror without hair, thinking there was something wrong with her visage, or wishing she was changing back toward the cat she once was. The itching of eventual hair growth on her scalp was annoying, though allowed her the privilege of at least looking human, as little as that seemed to mean to her.

The dreams she experienced vividly that night were very much reminiscent of those while she was a cat. She was back in her panthress body, not in a cage this time but rather free in her natural habitat, stalking prey and exploring her domain with the grace and sovereignty of an apex predator. And there was a sense of feeling she was in her own skin, missing the fur and paws and above all the tail of the beautiful beast she had been. Though she surely couldn't still want to be an animal, there was no denying the sense of dysphoria she felt upon waking in a human body, hoping the feeling would fade but not having that be the case as the days went by. It was becoming more insistent at the fringes of her psyche, robbing her even of those blissful moments of sleep she once cherished so that she might feel whole again through her dreams.

There was one other thing ailing her, one that she did not want to admit to anyone. It seemed that even with the sufficient sex she experienced as a panther, her feline heat had not yet abated. At first, she attributed it to a residual effect of the nanites. But as the days went on, the need in her sex seemed only to increase, making her think she really was in some sort of heat, as impossible as that should have been. Even touching herself several times a day was not enough to fully sate her lusts. It was as though she longed instinctually to take panther cock inside of her once more, though such was unavailable to her and would not be welcome in her anatomy besides.

Little did she know, Michelle had unconsciously missed her period, something that was due soon after the change back but something that seemed to have passed her by. Her body, in the midst of change, had started its human reproductive cycle, something she had never paid much attention to with perfect contraceptives and never wanting children. So, she was thus left ignorant of her cycle, the unprotected sex she'd had, and the nanite's prohibitive to protect life and regenerate life...

More pressing issues were playing through her mind as the days went passed from her experiences. A seeming sense of species dysphoria crept into her mind, even as she moved into a hotel to await the call to return for additional scenes. She missed her fur, her tail, and the suppleness, and strength of her panther body. Perhaps more desperately, she wanted sex, that primal need to demand it from a worthy male and take his cum inside of her. Even as she settled back into her human life with all its creature comforts, there was something missing she could not deny. Though she knew she did not want to be a cat on a logistical level, deep down there was something wrong with her body that only a feline's form could satisfy. Did David feel the same way? Could she ever ask him such a thing?

It seemed like her wish was soon to be granted, whether or not it was something she truly desired or a remnant of the nanite's influence. Abruptly, Michelle woke in the middle of the night, cunt lips leaking from a feline-inspired dream and all the promise it gave her. There was no denying it was a panther male giving her such pleasure within the fantasy, almost nothing else she knew capable of doing so to such a degree. And, as with many evenings as of late, she would touch herself to quell the aches in her sex, even though it was impossible to settle for anything else that wasn't a short-spined member. She could imagine it, though...

Yet, the moment her hands touched her sex, Michelle realized something was wrong. Her genitalia did not feel right, even in the early morning as she struggled to touch herself. Its contours were tighter, the sensitivity of her clit not present, and it carried an overwhelming desire to be penetrated by a warm cock. She liked penetrative sex, to be sure, but this was much closer to her recollections of feline heat. Still, the sensation of her changed bits sent her into a bit of a shock, not able to fully process what was happening.

Yet, before she could get up and try to discover the source of the change or some help in reverting it, Michelle's hands were on her sex, one teasing the wet folds while the other traced her groin and moved eventually up to her breasts, which felt more sensitive than at any other time in her life, save the mid change she had experienced the week prior. She knew it was a bad sign, that the nanites should have been purged from her system, and there was no way she could change without them. But she was clearly in the throes of change, definitely awake and lucid as she came to that realization. And there was no ability to resist them, needing it more than anything she had been aware of.

With her lust at its zenith, it took little time for her to reach her first orgasm, calling out in a tone that should have been out of her range but sounded all too much like the cat she had been just last week. There was no way she could have sounded like that, but if the changes had already started, there was every chance of a total, gradual reversion and all the facets of being a cat to come with them. How fast, she had no way to say. But in the moment, there was little ability for her to care with her literal dream being granted before her.

The heat that had invaded her sex was ever present, and there was no resisting its siren call as she continued to touch herself, rubbing another orgasm through her loins. As skilled as the male had been, it was rare he could bring her a second release in a single session, and she was craving it now. Of course, he could go multiple times a day, something she could certainly attest to. And, best of all, without the cameras rolling, she could get access to him as many times as he was able, to finally fill her with enough cream to give her the cubs she desired...

As though the oncoming orgasm was a catalyst, Michelle could feel an itching over her back and chest, as though pinpricks of hair were erupting through the follicles. It was starting to get persistent across her skin to the point that she wanted to rub it down to quell the irritation. She had felt it before, of course, in those final throes of change. But lost in lust as she had been at that moment, there was little care for the itching or discomfort. Now she was prompted to rub as much as possible with one hand, unable to take her hand off her sex in an effort to cum.

Rubbing the darkening patches of fur over her skin, Michelle was shocked to feel what started as hair follicles quickly erupting from newly formed pores over her neighbors, creating the start of what had to be a fully feline pelt. Like the changes before, lovely black rosettes played over her chest, and across her back she could feel against the bedsheets. They sprang up in their beautiful, integrated patterns over her skin, leaving only moments to admire them before their counterparts grew as well, giving her a lovely full-bodied coat. The fur seemed to settle below her neck and shoulders and above her hips and groin, not yet covering her face, unlike the previous change.

Her breasts, too, remained bare for the moment, though they seemed a little smaller than perhaps they should have been, making her wonder if they would be the next thing to change. A tingling in their areolas confirmed what she was concerned and curious about in equal measure. She had loved their removal from her form the first time, feeling their fat, mass, and tissue dissolve and pull into her chest. The flat, muscled chest of a panther could be hers again, as long as she was rid of these pesky breasts. And even as sensitive as they were, she figured she would lose little of that as a cat. Having paws the last time she possessed them, Michelle was curious, even in her sex-crazed mind, what it would feel like to touch them. And the extra pair to grow below them...what would that be like?! Michelle could hardly wait!

It would not be something she would have to contend with for long, given the tingling occurring just below what she understood were her primary pair. They had sucked into her chest, as bare as a male's though still possessing the tiny nubs of a female's nipples. They seemed to move lower on her anatomy, almost to the point of parting the fur in their wake. Eventually settling toward her stomach, the absence of fur over the nubs made her certain she could feed cubs the way her altered psyche had craved so much since the nanites had first been introduced. There was nothing stopping her from playing with herself running her hands over them and teasing the second pair to come to the surface as well. Both pairs were just as much the pleasure centers as her breasts had been, and Michelle was eager to touch them in tandem with her feline sex.

Her vagina, for its part, was less sensitive on the outside, and she almost longed for something spikey to press inside of it. Her touch was bringing her closer to orgasm, and the feeling against her nipples was almost orgasmic on its own. Touching over the two rows of tits had her growling, loving the feeling of fur between them and the exotic nature of their duplicity. Just possessing them was enough for her to orgasm, powerful spasms running through her body and making her cry out with that feline cadence once more. It was enough that surely she had been heard by the rooms beside her, though no one came to interfere. And Michelle preferred it that way, not wanting to share her body or her sex with anyone, save for the male that her body so craved. The one that was currently absent...

It wasn't until that second time that rational thought returned to Michelle's mind, not fully aware of what she was doing to herself but sure of it now as she rode that last orgasmic high. The itching of soft fur growth had ceased, giving her part of the coat she so cherished and held in such regard. There was little to be done for it, given the changes were done for the moment. And they had come on with sex...she was sure she had been masturbating in her sleep, something Michelle had done often in recent days. It was almost as though the changes were occurring in the same fashion as the film, like the act of sex was actually changing her in real time. Though it should have been impossible, there was no denying what was happening to her. She had masturbated, came twice, and incurred several changes to her anatomy. What she had been told was a lie, and she was in the throes of a reversion into her panther self, whether she wanted it or not.

Being 3 a.m. as it was, there was little point in trying to contact anyone for help. So, instead, she laid there, trying to sleep and glad she was at least over her lust for the moment. At first, sleep did not come, fears of panther dreams at the forefront of her awareness. She had loved it so much in her recollections to the point that even touching herself would do little to satisfy her needs fully. But with the reality that it was to change her...it took everything good and safe from the process. She didn't know how to feel about that, or how it was even possible, to begin with. And there was nothing left for her to do than to wait and see what the morning brought.

The more she reflected on it, the more the intrusive thoughts seeped into her mind, as though planted there by feline instinct. The notion of bearing cubs from her loins and having them suckle from her teats was ever-present. Yet, the more she reflected on it, the more the desire was...satisfying if that was the right term. As though she no longer needed...what did that mean? Was she already pregnant? No, there was no way for her to know that. It was, however, impossible to deny the moment that thought entered her mind, she felt it fit, as though a truth she could not ignore.

Unable to sleep, she got up to check some information on panther pregnancy. 80 days was the norm, and a female could, in fact, know when her egg had been fertilized. It didn't necessarily sap her heat away, something she deeply lamented. Especially if it would change her further... yet, she certainly needed it at the time!

The entire ordeal was impossible, she knew. There was no way to become pregnant from the nanite's effects, she had been told. So then, what had happened? Michelle recalled she hadn't used any protection for the sex scenes filmed before the nanites were injected. What were the odds of her being pregnant from that one sexual encounter? And, if she had...the nanites were designed to protect the user's life above all else, right? Even if they were supposedly removed from her system, had they persisted, just to protect this life within her? One that, like her, had been converted into a panther, even at the embryonic stage? Why sex was the apparent catalyst, she wasn't sure. Maybe it had something to do with orgasm and the fertilized egg. It didn't make any damn sense, and she could barely afford to wait for a second opinion!

It occurred to her that even if she wasn't ashamed of the whole ordeal, she didn't even know who to contact for help. Nanite transformation technology wasn't exactly commercial, and there was no way to know who her agent had contacted, save the agent himself, who was on vacation for a few days. And who knew how long she had before the changes were made worse? Surely, they would know an errant panther was a former human, but she didn't want to take that chance. And, of course, there was that ever-present part of her ever since the changes began that did want to fulfill the powerful biological drive to become pregnant and birth young. It was so hard to fight against it when everything felt so right!

Eventually, sleep did come for her, the adrenaline eventually wearing off to the point she passed out. Though with everything that was happening in the waking world, it was impossible for her mind to truly sleep. Panther thoughts were bleeding over as though even the simplest changes were a catalyst. In particular, the fur she had so cherished made resting against the sheets impossible, and she found herself rubbing the skin vigorously, loving the soft, luscious texture. It was wonderful, and even in her dream-like state, she was able to play over it with reverence, as though she wanted even more to grow. And she was soon to get her wish!

The now-familiar itching started to play over her arms and legs, and Michelle threw the covers off to be able to experience it in real time. She wanted it so bad, despite her previous fear of the change and all she had to lose from becoming an animal, possibly forever. It felt so good rubbing against her skin when her mate possessed it, but without her fur coat until post having paws, she had no way to feel it growing over herself. Now it was hers to explore as she wished, and it was every bit as amazing as she hoped it would be. The fur was soft and thick, and rubbing it down seemed to make more grow down her arms, stopping at the edge of her wrists, and playing over the backs of her hands. It was wonderful, and even without her feline tongue, Michelle was still tempted to reach out to lick it into place. The fur against her tongue was uncomfortable and without the barbs she held in reverence, it wouldn't be enough to achieve the desired effect. But it was enough to know that she would soon possess the ability as the changes moved toward their inevitable conclusion.

There was no denying the urge to touch it as fur continued to play over her thighs and legs, sparing her groin for the moment as they moved over her lower parts. Teasing her hands over the skin, Michelle was delighted to have her fur pelt cover her thighs and calves as any errand hair follicles erupted with panther fur, coating her completely to obscure the skin. Even the backs of her feet were covered in a fine pelt, and Michelle moaned, loving the sensations of growth and all the promise they would bring.

Of course, with her fur coat came one of the more overt changes, Michelle feeling it starting in her dirty human hair. Strands began to loose from her follicles in droves, falling to the floor only to dissolve into nothing. Curious, she moved to a mirror, watching her hair fall from her head, dissolving into nothing as pepperings of black panther fur started to replace the bare skin. Yet, the thought of losing the hair only served to excite her to the point that Michelle wanted nothing more than to be rid of it, loving as the last strands faded from her form and her scalp was covered with panther fur. Strange as it was, Michelle seemed to love the look, wishing only that her skull would alter into the feline shape she craved.

Naturally, the sight of her changes had an effect on her sex, making her wet and horny and desperate to feel the barbs of a male's panther cock. Though part of her didn't want to touch herself, remembering the fate of the main character in the film, the urge to do so was powerful to the point she could scarcely contain herself. Michelle simply couldn't get the touch of the male out of her head, nor the cat she had been and the sex she had enjoyed. She had no way to know if he was up to the task, still carrying the traces of the nanites that would make him a panther as well. But she could imagine it and certainly did the more her mind moved toward panther pursuits. And with that, there was no recourse other than to touch herself. Regardless, it still felt amazing, enough that she was unable to stop!

The consequence within the film's lore seemed to be proven in real life as a tingling in her spine seemed to signal the familiar separation within the final seven bones of her coccyx. They began pushing at her back, forming a nub within the flesh that started to penetrate the skin. Even through all the fur on her back, she could feel the growth pushing out almost an inch and continuing to lengthen. It was almost as though she was willing the individual muscles, tendons, and bones within to force their way into the protrusion, giving it enough material for it to grow to the length that it could.

Michelle waited with bated breath for it to properly develop its proper range of motion motion. Focusing all of her attention on the nub, Michelle was delighted to feel it twitch, just a little for now but enough for her to know she would be able to swish it at multiple points of articulation soon. And at three inches now, it already seemed able to bend from the base and the tip, everything Michelle had wanted and more to have it returned to her. It was getting longer each moment, and Michelle could not resist touching herself at the notion she had one once more.

As another inch of tail was added, its flexibility grew, and Michelle moved it to wrap around her legs, rubbing it all the way down to the base. The base where it connected with her spine was more sensitive than anything her human body had known, and rubbing it in tandem with her sex was almost enough to knock her over from lust. She stood there, imagining a male fucking her cunt lips and making her tail lengthen as he did so, getting off on the notion of such alone. And at five inches now, she was soon to get her wish, a fluffy pantheress tail the envy of her species. Best yet was the slow spread of black fur up to its tip, leaving no inch of skin to show. It was almost done...she almost had her tail once more...she...

Stifling a growl, Michelle felt her body going into orgasm, stumbling backward and onto the bed as the pleasure grew too much for her to bear. Thankfully, she was able to land on her side so as to not crush her tail, writhing on the bed as her body was wracked with pleasure. It was second to only the sensation of a male's spines, but it was enough for her to cum, and cum again with another orgasm on the heels. Each tremor of lust seemed to sink into her tail, as though causing it to grow another inch until the weight of it returned to what she recalled to be perfect for her pantheress form.

It took some time for Michelle to regain her faculties, though eventually, she did, standing easier with the presence of a tail behind her. By this point it was obvious to her that masturbation was changing her faster, bringing out the panther in her as it had for her character in the movie. Though there was a part of her that didn't want to change, didn't want to be an animal, that part was swimming in panther hormones as another orgasm wracked her loins. She had things to look forward to in the human world, to be sure. But she was in heat, and with the memory of its alleviation so firm in her mind, there was nothing in the immediate future that could match that satisfaction.

Eventually, the desire for a panther's penis was enough to compel Michelle to look up the location of her co-star. Researching him online yielded no results, his schedule something not publically available. It was soon looking like she would never find him, despair filling her being. Though that budding feline instinct knew she was already pregnant, the heat had not abated. Nor would it for several weeks, much to her chagrin. Would David change in her presence from the nanite's residue effects? Would he even want to return to life as a panther, possibly forever? Did it really matter to her?

Eventually, Michelle decided she had to try something, anything to find that which she sought so fervently. There was a hotel nearby, upper scale, and she had it under good authority that both she and David were contractually obligated to remain within the city in case of reshoots. Surely, calling the hotel to ask about her lover's presence might yield some results. And it did, the lie about their relationship status enough for the desk to give her a name and room number. All she had to do was to seek him out and get everything she desired!

Her initial offer of after shoot drinks was declined, David apparently not interested in the implication of what that meant. She was insistent and could hear the need in his voice, but he ultimately grew frustrated, hanging up on her. Perhaps the influence of the nanites was still within him, or perhaps he could not help but recall their stint as a mated pair. Either way, he would be unable to resist the scent of her pheromones, and Michelle made the choice to visit him in person.

Such was easier said than done in her current state. Having to stick her tail up under a sweater was powerfully uncomfortable, not to mention her distaste for clothing against fur. And she had to keep her hood up to avoid the awkwardness of her bald pantheress visage. Thankfully, she made it to the hotel without incident. Having the room number, she knocked on the door, taking off her sweater and coat. She had not bothered to don underwear, and the scent of her heat was palatable to her nose, as she was sure it would be to the male. It was hard for her to think of him any other way now than the male who had implanted her with cubs and who could continually use his prick to ease her ache. Either way, he would do so soon, and hopefully eagerly.

"What the..." David stared at the nearly naked panther woman, like nothing he expected to see outside the movie set. His delay from his fear response made him susceptible to her heat, and David wavered, nose twitching from the pungent, heady aroma. With that, Michelle was able to push inside the room, closing the door and giving them the privacy she wanted.

Already, the effects of her musk were enough to make sure David was infected. Be it the nanites left residual in his own system or an influx from hers, his nose started to flatten, slits breathing moist air and drinking in the molecules that spoke of her heat. His eyes wavered, and it seemed that any efforts to resist her temptations were soon eroded by the offering she brought forth.

Without saying a word, Michelle moved toward the bed, getting on it and lifting her tail upward. Her sex was not on display, hardly in the right position to be taken like a cat but wet and needy all the same. It was leaking over her fur furiously by now, and the more she flicked her tail, the more her heady aroma moved toward her potential suitor. She wanted desperately to be taken in a position like the cat she had been, and the tingling desire of her need seemed to do just that. It was all she could do not to yowl her frustrations at wanting to be taken. The sensations of her internal organs shifting to allow her sex to sit just under her tail were more than a little uncomfortable but worth the ache. She knew they would allow the perfect position to take the male inside her as she wanted so desperately.

Looking back without a word, she was privy to something that excited her more than the growth of her luscious pantheress fur. David already had his pants down, stroking off his disgustingly human cock with a leaking bead of precum. Yet, Michelle could tell even in the dim light of the room that his cock was starting to change color, pinker than the skin shade he once possessed. Like before, the former foreskin started to peel downward, clinging to his groin before fanning out with a coating of black fur. David winced with the development of what had to be feline spines over his prick. As the cleft melded into the pointing shaft and the length of his erection shortened, it was obvious his member would soon be suitable to mate her in the state she was in.

Penis changed, it did not take any further prompting for David to move forward, grabbing her hips and pushing his feline prick toward her cunt lips. The moment he was in, Michelle let out a needy yowl, pained by the spines against her cervix but excited for the fucking to come. Soon, her vaginal lips clamped on his cock like a vice, and she was pulling him inside, equal parts elated and aggravated by the feline functionality of his member. It was the perfect thing to quell her heat, all the better by the truth they were more feline than human, and this time not watched by cameras and crew.

With the potent stink of feline heat in the air, it took little time for them to reach their end, David trying to reach down and nip her nape, though, in his human form, he was unable to achieve even that. Still, his cock reached orgasm, the smaller quantity of sperm still enough to send waves of satisfaction moving through him. Though it was hardly enough pleasure on its own, the fact he was breeding a female in heat gave a more thorough fulfillment than anything the human him had ever known. Something that he had only gotten when he'd been a full cat. An animal...

Shocked at what he'd done, David pulled out, not bothering to clean the cum from her cunt as he might have done as a full cat. Rather, his words were harsh, yelling at her to get out lest she damn him further. Michelle did just that, lost in the lust and post-orgasmic reverie and hardly concerned with his harsh demeanor. His nose was still sniffing her heat, and such a reaction was par for the course for feline mating. Until she needed him again, of course...

This time, Michelle did not bother to hide her panther tail or the scents wafting from her heat. Surely, anyone walking by her would think the tail an accessory like a furry might wear, though Michelle hardly cared what anyone thought. She was not one of them any longer, thinking herself more an animal than anything belonging in the human world. Instead, she relished possessing her tail once more, being able to swish it around, making her way back to the hotel.

After mating, sleep came easy, her heat temporarily quelled. She wanted to sleep with the male, but he would need some time to come around and accept his role. At least she convinced him in the end and she knew he would change, and become the male she required. And that was enough to know her needs would be taken care of...

At some point in the night, her whiskers grew back in, and she was prompted to curl up in such a way as to match her cat form, not having them poking against the pillow. Her nose likely changed as well, the pungent smell of semen and the lingering pheromones present in her sex lulling her into relaxation. It provided some comfort, though part of her knew she was not ready to be away from the male, she still needed him. Not able to really understand why, given her certainty of pregnancy, it was still a relief to know all she needed was to visit him once more to keep the heat at bay.

And visit him she did that next morning, sure he would take him in. This time she did not hide her panther form from the world, though it was largely considered either a costume or by some of the more knowledgable knowing it was nanite technology. Michelle cared little, of course, thinking of herself as a pantheress rather than a transformed human. It felt more right, more suited for her being, in a way that she had never known possible. Be it her desire or that of her pregnant hormones, she had no idea. But either way, this was her life and she accepted it readily.

This time, David answered the door without a word, able to smell it was her before she got there. He was naked, cock visible in a more animalistic position than last night. His nose and whiskers were present as well, but it was the growth of his luscious fur that truly had Michelle enamored. She immediately rubbed against it, not hugging him as though a human might but rather in feline fashion. He, too, rubbed against her, sharing their scents before preparing to mate once more.

Like the night before, Michelle got onto the bed, raising her tail and inviting the male to mate. David growled, lips quivering as he moved his cock with his hand toward her eager cunt lips. Not something he would be able to do for long, but necessary for his hybrid physiology. Still, it mattered little with Michelle needing it so bad, her cunt lips clenching on his stiff rod and taking it within her, feeling the familiar ache of spines raking her insides, filling her with a purpose beyond her understanding.

The changes were not to spare them, coming faster it seemed as they rutted their bestial delights. David felt his own spine extending until a nub formed, erupting from his backside, and starting to twitch with its ability to do so. It grew faster this time, though still sensually, making him growl and grip Michelle's flanks perhaps a little too hard. Soon, at several inches now and still growing, David had it moving back and forth in his eagerness to mate, barely aware he even possessed it from his focus on the goal.

For Michelle, her change was the formation of feline ears, rounding and swelling within and becoming coated with fine hairs, and taking in sounds from outside the hotel room. Other people were having sex, of course, some were watching TV, or engaging in a variety of other activities. To Michelle, it mattered very little, given her need to be fucked and her feline ability to shut out the rest of the world and non-existent threats.

Like before, the mating act was brief, coming to the point of conclusion almost at the moment of penetration. Be it their pent-up lusts or simply the way of feline mating, David soon cried out with a yowl as his balls shook and he deposited his virile seed within her. This time, Michelle was quick to cum as well, feeling her sex quiver and her entire body spread into orgasm. It was a nice pleasant fuck, fulfilling the feline instinct to ensure her eggs were properly inseminated, something she knew was already the case but something her physiology seemed to want to ensure besides.

In a moment of clarity, David moved to his cell phone, making a few calls and sounding rather urgent. Michelle could not bring himself to care about it, however, with the contentment of being mating and fulfilling her biological prerogatives. She could barely perceive the words, though it seemed he was calling an executive or the zoo itself in order to give them aid. She didn't want it, all things considered. Not to be changed back, certainly. Though she wouldn't mind a zoo habitat, some places she could change the rest of the way and regain all the feline quantities she carried with such reverence.

Somehow, David convinced her to leave with him, though she was mostly following her male to entice him to breed when her body was ready. She was content for the moment, and the words exchanged with the men David met with mattered little to her. She was able to comprehend some of what was being said, something about neither of them being able to be changed back with the nanite programs in place, their prerogative to bring her offspring to term. Why it also influenced the male was something they did not understand, though she didn't care, wanting the male in her time of need until her pregnancy was secure and her heat had totally abated. If David could resist sex, he might change back before the period of Michelle's pregnancy was over, but with some resignation, David admitted that would be impossible and decided to embrace a feline fate.

With some urgency, the two of them were taken to a local zoo, one that had a habitat prepared for cats of their larger stature. It was all Michelle could do not to seduce her lover in transit, though she knew she would be put in a cage with him soon and that he would be free to have his way with her. From the scent of David's erection, Michelle was sure he wanted the same and was glad to give it to him, knowing she needed him as much as his own biological directive was to take a female in heat. They were told they would be given privacy until Michelle's estrus had passed, though they would be required to show off to guests during her pregnancy. Michelle was in no state to respond to that, focused on feline endeavors rather than any foreign notions of human modesty.

With that, the soon-to-be cats were shown to their new quarters, a little small for them but nonetheless sufficient for their needs. Clothes were thankfully discarded, fur covering them anyway and constrictive against their fur besides. The moment the two of them were guided into their pen was the moment David pounced on her, teasing the back of her neck even though he still lacked the teeth to do so. He was all instinct as he went to mount her, and Michelle would have it no other way. Eagerly, Michelle raised her tail, wafting her scent in his direction and even peeing a little, urine laced with hormones as she signaled her receptiveness to breed. As she had anticipated, the male was on her, penis in her cunt and giving her all the sensations she'd come to expect from having a male panther willing to mate.

This time, the mating had a consequence that might have once bothered Michelle, but one she had accepted was par for the course of panther life. Her fingers started to crack, reducing into her palms and peeling open with the formation of new claws that poked out her former nails. She was glad to be rid of them, having more useful functional claws, and the moment she was able to flex them, she did so, digging them in the dirt of the pen and relishing their existence on her form. Swollen, massive paws, nubs of digits, and no functional thumbs were not as scary to possess as she once thought, not needing them for the life she was to live, human hands a relic of her past. Their loss signaled the death nulls of humanity and something Michelle welcomed eagerly.

It did seem as though the changes were coming faster as they rutted, as though they needed to take their panther shapes to show their eagerness to procreate. A series of cracks caused David's stature to shift within her, likening his posture to match a quadrupedal stance. It was such a drastic change, yet Michelle could muster no sympathy for him, given that his previously shallow thrusts allowed him to penetrate even deeper within her, hitting her sweet spots and making her growl with contentment.

Soon, it was over, another small dose of feline cream within her to signal their mating dance had ended. It was getting late in the day, though neither of them was fatigued, in the throes of feline heat as they were. Both knew from experience that sleep would come briefly during this time, that David would be compelled to take her as much as he could physically manage. And Michelle was eager to experience it all over again, finally having the male to have her way with as instincts dictated.

The changes, too, seemed to be coming more rapidly as the oncoming night crept in. The same tingling just known in her hands started on her feet, toenails popping out at the pressure of panther claws within. Toes curled within as her heels stretched and their balls grew massive. Michelle enjoyed the feeling of her back legs altering, thighs flattened into eventual flanks as calves constricted and heels made up the most of their length. Best of all was the swelling of muscle under the skin, making her far more powerful than her humanity ever had a right to be. A much more preferable form in her mind, to be sure.

The same changes were overcoming David's form, though Michelle hardly had a human understanding of what was happening to him for her to care. It was his stance inside of her that Michelle truly cared about, wanting him to be able to mate her in the way she craved. It was only the muzzle that he lacked to bite down on his shoulders to confirm his place as a male panther. And that would come soon with each mating changing them faster and faster.

Michelle lost track of the number of times the male had come within her, though it was of little consequence with the amount she craved him inside of her. He was changing all the while as well, of course. One significant alteration was when he tried to grip her sides with his hands, only to have them altered into their feline equivalents soon after, claws digging into her fur and skin and making her growl. But it was of little consequence to the mating act itself and was enough for her to still get off, knowing he needed the paws for the final transition.

Naturally, Michelle was in a place to feel her own changes coming about, her pelvis realigning and her spine settling into a life of four-legged travel. She cared little at the moment, wanting to be on all fours as was her pantheress right. The instant tingling of nipples against her fur did bring with them a desire to have hands to touch them, though she was fine with her fate for the moment. But she instinctively knew that within a few short months, they would be filled with milk and that she would have panther cubs to ease their ache, something a part of her longed for with more urgency than she could ever muster.

In truth, the final alterations to her form meant very little in the grand scheme of things. Her tongue was of most note, needed to groom and clear herself and her mate. But her feline fangs served little purpose in her captive life, save to bite into the already prepared meat she would consume as she had prior. Still, she was happy to feel her human ones falling from her head, replaced with the carnivorous ones better suited to her form. Growing back into her muzzle was welcome, and she felt more comfortable to see in front of her as she had been expecting. But it was the male she wanted to grow his own for selfish reasons, to have it bite into the nape of her neck and hold her still as he came within her.

Though they were fully changed by this juncture, their need to mate was still days away from being sated. It was hard to focus in human terms while slaves to their panther urges. The two of them managed to fuck multiple times a day, with enough human intelligence remaining to truly enjoy it. The moments their humanity resurfaced were fleeting, but enough for them to truly revel in the act from both perspectives. Michelle preferred it to be from the perspective of a pantheress, but there was no denying her human side, and how she had once been another being altogether, sometimes looking at her animalistic actions with a sense of purpose and enjoyment. Those thoughts were quickly undone with the promise of feline pleasures. She had never wanted children, and even some remnants of human instinct could not dissuade her from that certainly. But as a cat in heat, such was her only purpose and one she took on with a sense of pride that defied her human experience.

Panther life was easy for both of them to acclimate to, given their stint of doing so in the few days it was required. Shitting and pissing in a litter box, though repugnant at first, was something they grew accustomed to, even the cleaning of their anuses and genitals. It was a life of ease, of little want, eating when fed, mating, and sleeping when there was little else to do. Eventually, the zoo brought them forms of enrichment, things like toys and treats that triggered feline sections of their minds. Human wants like TV were brought to them as well, but it was of little interest to the changed cats to the point they were quickly removed.

Though it was boring living as panthers by human standards, the two did not seem to mind, much of their humanity taking a backseat to the needs of their panther bodies. Even when sex was no longer a factor, the relaxation and lack of urgent tasks were rather pleasant, if only to slowly watch the world pass by. It would do for their minds to have more enrichment activities, or to be wild, free beasts, but the zoo did its best to match their needs, and it was enough that neither of them longed for their human lives as much as the inclinations could reach the forefront of their awareness.

Thankfully, the gestation period for panthers was much shorter than for humans and did not come with the morning sickness, aches, and cravings that would have plagued Michelle's human self. It was easy, the extra weight hardly a deterrent to her daily activities. She would need to be able to hunt and feed herself, after all, had she not a zoo's chef to tend to all her dietary needs. Even the birth was easy, a simple period of pushing to birth her three cubs. The only distasteful thing was cleaning up after them, though panther instincts were there to make such acts deplorable to human senses were taken in stride.

Eventually, her cubs would be weaned and the humans would come to her, offering her the chance to be human again. There was nothing permanent about the process now that her cubs were birthed, after all, and lacking access to a panther to care for them and her apparent love of the body, the zoo staff saw it prudent to allow her to bond with the cubs. But, be it too long in the form and degradation of human thoughts, her love of being a panther, or her connection to her cubs, she seemed lacking in longing for her human life. It was decided to leave her be, perhaps offering her the chance down the road once her cubs were taken from her to be relocated to other facilities.

The male, too, was uninterested in the reversion process, shaking his head as a verbal no when offered. He maintained his sensibilities more than his mate, though had come to love panther life, its ease and simplicity eagerly accepted once he had gotten over some of the less palpable aspects of being an animal. With that not in mind, they assumed the same was the case with their resident female, knowing instinctively that both of them had found something better for themselves, some contentment in their new lives. They had a family together, birthing a rare species, and it seemed prudent to allow them to continue on in that life, something they might have never wanted but something that made more sense to them now. Thoughts of the movie, of money, of fans and tabloids of what they'd done to enter their new lives together were erased with the certainty they had finally found some happiness.