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The end of the week was rapidly approaching, and Alita was running out of steam...but coming back from her final break of the day and putting on her handling gear one last time wasn't such a tall task when she knew that she only had two hours left to go.

"Looks like Frederick is getting tested today...poor boy has been waiting for this for almost a month," she bemoaned his fate. "And naturally, it's all in the name of seeing what kind of effects that'll have on his samples..."

Alita wasn't ashamed of her line of work: she was actually _proud_to be working in the field of animal biology, but the well-paying jobs were few and far between, and sometimes, you had to accept whatever work you could find.

It was rare that she shared her full job title with a stranger, but as her family knew and teased her about, she was a sample collected for an equine research facility.

"Honestly, do they really think putting a breeding stallion in chastity is going to do anything different to his semen samples? They must be running out of other things for us to test..."

Alita didn't question the importance of her work, but as the years went on and her daily routine became stale, she wondered if she was getting the most that she could out of life. She'd heard every joke in the book about the long , difficult work she did on a daily basis, and every night when she came home, she had a new host of questions from her roommate.

They were genuine, interested questions, but they left Alita_slightly_ concerned by the amount of interest her roommate was showing in the more intimate body parts of the horses she worked with.

"Oh well...it's Friday, and I guess both of us will have a reason to be happy in a few minutes," Alita muttered. She left the breakroom with her uniform neatly adjusted and her hair tied back once more; from there, she left no time for small talk or passing interactions.

It was rare that her job required any real elbow grease, as most of what she did was general observation and recording of data, but on some occasions, she did have to move a little closer to the horses she worked with. They had a great rapport with the researchers that cared for them, and in as much, Alita was one of the most trustworthy people those equines had ever known.

When the sample collectors were making the horses uncomfortable, it was up to Alita to make them feel safe: whether that meant standing by their side and brushing their flanks to keep them soothed, or rubbing her palm delicately along the sides of their muzzles, Alita was experienced in keeping her four-legged friends happy and relaxed while the machines did their part of the equation.

She knew she could trust Frederick not to need her help, and as she approached his stable, she could already see his demeanor improving. She waved to him even when he had no way to return the favor, and as she punched the digits in the door code, she could see him stamping in place with outward excitement.

"I know, I know...we haven't seen each other in a while. I'm sorry that they've been keeping you cooped up like this," Alita murmured. She closed the door slowly and gently behind her, wanting to preserve the comfortable atmosphere that was created for her favorite stallion. "Hopefully that machine is treating you better than they have been?"

A false mare was beneath him in the form of a stockade, holding up most of his weight while the machine inside hugged his flare and pumped on it. In proper equine fashion, the moment was going to be extremely short, but as part of her research, Alita was required to watch the pinnacle of the act and document any behavioral changes that might occur as part of the forced chastity.

She wasn't at all surprised by the fact that Frederick was humping aggressively at the mountable furniture, but her cheeks were still burning with the reality of what she was watching. She couldn't help a twitch in her ear when she heard the force of a powerful cumshot landing against the inside of a hollow tube, and finally, the satisfying clomp of hooves scooting back and settling down once more left Frederick to collect himself after a violent release.

"You really don't mind performing for an audience, do you?" Alita joked, trying to keep herself comfortable with her quip; she knew Frederick would be able to sense if she was in distress. "That was...something else, big guy. I'm hoping that they never put you through something like that again."

It was an innocent reaction on the part of the horse, but as Alita approached the table to collect and bottle the sample, he turned unexpectedly and tried to nudge his muzzle against her shoulder.

Being the massive beast he was, when she didn't see it coming, she was knocked to the floor with the uncapped sample...and immediately, her day became that much longer.

"S...son of a bitch, Frederick," she kept her voice low, under her breath as his spilled sample eased between her sleeves and ran down her arm. "You've gotta learn to contain your emotions, big guy!"

She wasn't harmed, but she was embarrassed as she stood up and stroked his side, accepting his silent apology; doing so while she was literally wearing his mess left her face burning.

"Let's just get this over to the lab...and maybe I can convince anyone I see on the way that I spilled my salad dressing or something," she joked with the horse, knowing that he really didn't know any better about the mistake he'd made.

Her mistake, however, was not sealing her handling gear properly in the first place; her arm was itching in a reaction that she'd never known before, and with Friday night looming, she made her next mistake by shrugging it off.

**

"Still isn't coming off...why isn't it coming off?"

Friday night came and went, and Alita spent the evening bumming around with her roommate, Sephina. They had the usual routine of splitting a bottle of tequila, lounging around in pajamas and talking about how difficult it was to get to the weekend in the first place, and that night, nothing felt out of place.

Saturday wasn't quite the same, however, as Alita woke up with her hand in her panties and a damp patch against the palm of her hand...and even that wouldn't have been so strange, if not for the subtle growth of her clit, appearing more obvious than she'd ever known it to be.

"So much for that hair removal cream doing anything other than stinking up the bathroom," she muttered, regretting that she'd need another shower just to get it all to come off.

The thicker, downy hairs of brown that were creeping up her forearms and moving toward her obliques, however, wouldn't come off with anything.

She'd considered a razor, but she didn't want to leave stubble near her hands; waxing would have been too painful, and she only had a few hours left in her Sunday to figure things out for the week ahead.

A lab coat would cover up anything too suspicious at work, but her social life was her greater concern.

"Guess I can keep them distracted if I just drop my pants first," she muttered, snickering at the sight of her still engorged clit. The hood didn't even have to be pulled back for her to get an eye on it, and in the privacy of the bathroom, she couldn't deny that the ease of access was getting to her...but the growing hairs made her just too self-conscious to do more with herself. "Won't have to worry about anyone being able to find it, anymore."

She was already worried that she might be having a reaction to something at work, but the fear of losing her job kept her from saying anything in a phone call or an e-mail to her bosses.

It didn't, however, preclude her from pulling her comfy pajamas back up and meeting with Sephina in the living room once more.

"Did you fall in or something? I almost lost interest in the movie; I was waiting so long..."

"Just...j-just checking on a few things," she admitted, and though she wanted to leave it at that, she felt she could trust her friend with a little more information. "Does it feel like my arms have gotten hairier, to you?"

Sephina was a blonde, and even at it's longest, her body hair was fine and easy enough to handle. Her eyebrow cocked as she looked over Alita's forearm, but it was when she saw the texture and thickness that she began to wonder.

"Not that I've ever really paid any attention to that, but it's weird that it's going all the way up past your elbow," she admitted. "You bump into some testosterone samples at work or something?"

"Not, uhm...n-not exactly," Alita murmured. She hadn't told the embarrassing story to Sephina just yet, and she wasn't sure that she could find the stomach for it. "But even if I had, I don't think that would explain all this. It's really thick and...k-kinda soft. It's weird."

Sephina wasn't drawn to the sight, but she was curious enough to reach out and stroke her fingertips over Alita's wrist, pushing up the follicles and testing their texture. "It's almost like the hair on your head...I didn't think it was possible to have hair that soft on your arms."

"Pretty sure it isn't."

"Is that why you've been distracted most of the weekend?"

Alita glanced away. "Sorry if that made me distant, but I was worried," she admitted, biting back on her shame. "You think I should go see a doctor or something?"

"If you wake up one day and you've got more hair on your arm than your head, maybe. Otherwise...who knows? Could just be hormones fluctuating, could be a reaction to something at your job; doesn't really look all that serious."

Sephina would have come across as dismissive to a stranger, but Alita knew better: her friend was trying for a comforting angle, to keep her from making a mountain out of a mole hill.

"Just let me know if you notice anything else, okay?"

"I'll be ogling you all week, then...just so you know what you're getting into."

Alita properly crashed back on the couch, picked up a pillow and shoved it in her friend's face. "Like you haven't stared at me on the way out the door to work a dozen times..."

"A dozen times a month, anyway," Sephina played right back, knocking the pillow away and starting the movie back up. "Trust me, Alita: if I see anything more that's out of the ordinary, I'll be sure to let you know."

Sephina was a good friend, and attentive enough that she would be able to keep her word, but she couldn't force Alita to get help.

She didn't realize that her inability to do so would drive such an unusual wedge between them.

**

Midway through the week, Alita was so irritable that it didn't matter if her lab coat was covering up her physical ailments: she couldn't disguise her frustrations, and the change was deeper than the skin.

Even her bosses, those she considered the most inattentive people in her life, were starting to take notice of her poor attitude toward other employees.

"The last thing we want to do to any of our employees is take any sort of disciplinary action, but you've always been the kind of worker that doesn't get noticed by her peers," one of her bosses explained.

Seated across from her in the small, quiet meeting room, they were trying their best to wear comforting faces, but all Alita could think of was the possibility of being let go from her job. "So far this week, however, we've received several complaints from other people in the research bay that you've been approaching them with aggression and frustration...and while we're glad that people are finally taking notice of your work, it's not a good thing that they're...worried about you."

"Worried about me? Why? No one here has talked to me in half a decade, and now that I want them to hurry up so I can catch up on my sample collections, I'm the problem?"

"We're over the moon that you're so eager to get your work done, but Alita...y-you...you can't just go pushing people out of the research bays."

"I'm just trying to follow occupancy protocol."

"Fair, but you were berating people for taking too long, as well."

"They were."

"And if that's the case, we'll have a talk with them after this and make sure that they understand the importance of staying on task...but that's our job, as the managers. We're glad that you want to keep up productivity out there on the floor, but let us worry about that, okay? We don't want you stressing out too much!"

All told, her managers were doing a wonderful job of treating her with respect and care, but Alita was embracing the new aggression that bubbled up within her.

"If you don't want to stress me out, don't call me in here for a 'random meeting' when I know you're just going to use it to punish me for working harder than my peers, okay?" she demanded, and even then, as far out of line as she was, her managers were too befuddled by the sudden change of demeanor to say much. "I'm falling behind on my sample collections again..."

She stormed out of their office, and as the men shared a look, they shrugged.

"Do we tell her that her numbers are near company records?"

"I wouldn't."

**

By Friday, Alita's frustrations were boiling over, and she was finally given a verbal warning by her managers, but in the light of her continued changes, she hardly cared.

She only signed the papers on the warning because she had to, and when the managers saw the thick, plush follicles of brown on her wrist, they didn't dare to say anything, even though they were terribly curious what the story was behind them.

The sway of her hips, having thickened throughout the course of the week, was enough to keep their eyes on her as she left the office again, and her usual, quick pace was replaced by an uneven gait, as her feet were the next thing to change.

Already, her face felt a little longer and her nostrils were wider, but beyond the spread of hair that now covered her whole torso, there was a strange swelling in the balls of her feet: that was the straw that broke the camel's back, but she wasn't in any immediate danger or pain, so she didn't bother with convenient care.

She needed to make an appointment, and she knew she'd be waiting at least until the end of the next week before she could get into a specialist, so that remained the plan.

Getting through the rest of the week should have been easy, with another Friday breezing by, for the most part. She'd gotten ahead of the curve heading into the weekend, and staying that far ahead meant that she could kill time and coast before heading home, but...her mind simply wouldn't allow that.

She was enamored with something that she couldn't stop thinking about, but if she acted on her impulse, she'd have to worry about a lot more than losing her job.

"Don't even get to take a sample from one of the males today," she groaned. She preferred the ease of the act of simply putting a tube below the false mares and coming back to collect it when the stallions were done with their part of the deal, but that day, she was being tasked with collecting a different kind of sample from the actual mares that were in the research bay. "Good thing I was planning on getting a shower when I got home..."

The slightly messier part of her job involved collecting samples from the females, as well, and though she understood why it was an important part of her work, she never relished the thought of collecting samples from the mares.

At that moment in time, she chalked it up to acquiescence; that she was able to enter the research bay of Molly with even a hint of a smile on her face. All of the proper tools were in place, and a few small vials for sample collections were waiting for Alita, representing the end of her day, once she'd collected them.

One was simple enough to get: urine tests were easy, and Molly was a comfortable enough mare not to make a fuss during blood work, but Alita needed samples of internal mucus membranes, as well...and those could prove a more difficult task.

Her disgust was greater for the sense of difficulty as she entered the bay and looked Molly over with a new sense of appreciation, and immediately, she had to dash a strange string of thoughts running through her mind.

No matter how hard she bit back against them, however, the inappropriate thoughts continued creeping back in, taking up residence in her subconscious and forcing her to stroke Molly's flank with a touch that went beyond their usual greeting.

Alita had a way of introducing herself to every horse in the research stables, and all of them recognized her through a number of methods: a consistent appearance, scent, tone of voice and sense of touch were essential to making them feel comfortable and keeping them at ease.

Molly immediately noticed the difference in Alita's stroking fingertips and brayed at the ceiling, put off just slightly by her aggressive approach...and only hearing that panic was enough for Alita to realize that she needed to seek help for her sudden fascination.

She'd make a quick stop at her apartment on the way to a doctor, but her mind was screaming at her to let loose her sexual aggressions on the poor mare, and it took everything she had to drown out that voice for even another moment.

The moment would be all but past when she opened the door to her shared apartment.

**

Alita was still fantasizing about rubbing her massive, overgrown clit against Molly's backside when she threw open the door to her apartment, sweating bullets and panting with the rapid effects of her change.

Everything started so slowly that she might not have noticed it without Sephina's help, but now, it was too late for her to go out and find help.

She needed to placate a lust that continued to grow inside of her, feeding off that change and pushing her toward anything that felt even remotely equine.

"Sephina? A-are you home?"

"Home and ready for us to get to...t-to...movie night..." her roommate answered, though her voice trailed off when she noticed Alita's partial state of undress. The high-strung researcher was already halfway out of her jeans when she stumbled in the door, and the growth of her clitoris presented a literal bulge against the front of her exposed panties. "You know, I was starting to think that I might be having a few reactions to being around you lately, but I was getting ready to brush it off. Thinking maybe that's not the best idea anymore."

Sephina wasn't ready to talk about the fact that she'd noticed a greater sense of arousal in herself, or the quiet fantasies she'd been hiding from Alita the week building up to then. Just like her roommate before her, the spread of warm, soft fluff was moving along her arms and even over her torso, but all of it, she was able to ignore, until Alita slammed the door closed behind her.

Though she didn't know it, Sephina's body was giving off pheromones with such volume and intensity that they were flooding the apartment, and Alita's body responded in kind, bringing them closer in a silent, but entirely visceral way.

"We should d-definitely both go to the doctor," Alita agreed through stammering words. " After you bend over and let me fuck you."

The playful flirting between the roommates was always just that, and neither one exhibited anything more than a giggle in response; they were friends, and they liked keeping it that way.

Sephina's choice to only wear panties and a t-shirt for movie night, however, wasn't as unconscious as she wanted to pretend.

"Alita, y-you...you can't be serious."

"I can see you leaking, Sephina."

"And I can see you bulging through your panties, but don't you think that's a bigger problem right now?"

Alita stepped away from the door, but as she approached and stepped out of her jeans, Sephina couldn't bring herself to move. "Quite literally a bigger problem, yes...but I think you can handle it."

"That's not what I..." Sephina cut herself off. "Look, we are not being levelheaded right now. You're growing a dick, we're both covered in fur, I feel like my tailbone has been poking out of my lower back, and your feet are almost hooves...w-we should have done something about this a week ago, Alita!"

"But we didn't, and now, I don't want to."

It was still tough for Alita to walk on her strangely hobbled feet, but the sound of her bone structure hitting the floor was eerily similar to a clop , so much that Sephina felt like a stallion was approaching her.

That her mind recognized Alita as a stallion was concerning, both for her own sanity, and due to the fact that Alita was still sporting a full, soft pair of breasts, but where it mattered, she'd be able to deliver, if Sephina was willing to accept the madness she'd been sucked into.

"What if I don-

" Leaking , Sephina. Your panties are two different shades right now," Alita reminded her. "And I can see the shape of your pussy against them...so similar to the ones I have to deal with at work every day...did you even notice how much you'd changed?"

"Of course I did!" she yelled, struggling to keep her lines of arousal and frustration from blurring. "I just didn't want to believe it...and I damn sure didn't want to talk about it!"

"Unless it was with a doctor?"

"You're a researcher, not a doctor," Sephina reiterated. "And if you can't explain this, even when you're almost definitely the cause of it, what good is staying here going to do?"

Alita pushed her panties down and watched as her clit, now inverted with its sheer size, presented the tip of something that she'd been dying to see since the middle of the week.

It was a wide, obvious flare, and Sephina gasped as the length and weight of a full, equine cock unraveled from her friend's body...and almost immediately, vitality began rushing through it, as if a string were tugging it up into the air.

"Dunno if it'll do us any good, but I can just about promise that it'll feel really good...and I've had one hell of a week, Sephina."

As much as she didn't want to admit it, Sephina was nearly drooling with anticipation at the sight of Alita's new growth, and this time, it wasn't her womanhood making the mess. Her lips were quivering, and even though she couldn't see anything positive from it, her hands weren't just covering her panties, anymore.

They were pushing down at the wet, sticky fabric, slowly but surely, revealing the very top of her mound and proving Alita's theory about what was happening to them.

It wasn't clear why Alita was allowed to retain some of her femininity, but there was nothing feminine about the way her cock twitched and throbbed at the air, pointing with such impressive weight that Sephina was fearful to even try to take it.

Fear, as it turned out, wasn't the great motivator that lust was.

"You think I haven't had a stressful week?" Sephina asked, and as she spoke, Alita came a little bit further, stumbling her way into the living room with a new cock to walk around. "You think I don't need this just as much as you do?"

Somewhere, in their heart of hearts, the roommates both knew that this was the wrong course of action. The lust would fade, their minds would settle, and getting help was the best option left.

Knowing that, however, wasn't enough to stop them from taking the next step forward, as Alita pushed her length right between Sephina's drenched thighs and began thrusting.

"If that's the case, why don't you start acting a bit more like a needy mare...and give me something to lean on?"

Naturally, neither one of them was used to the bodies that they were slowly transforming into, but Alita was a little further along the path: shaking her way out of her t-shirt and leaving her body threadbare revealed widened hips and a slightly longer lower back, with a tuft of hair already forming near the top of her backside.

Her feet, even when she was standing before Sephina, continued to flatten and harden, until the settling of her stance produced loud clacks with every step.

The coat of fur that started as a curious growth of hair was more and more obvious, not just by the day, but by the moment...and Sephina took note of those changes as she watched a sheet of softer, blonde fur run down her torso.

Throwing her shirt off and turning around in front of Alita, the roommate knew she'd done nothing wrong to deserve her fate, but the burgeoning lust was such that she wasn't going to question it any longer; she gave herself willingly to the idea as she lifted herself from the invasive shaft and turned around, before dropping her hands to the floor and pushing her backside up.

The growth of her own tail was more obvious, with long, fine strands of blonde hair emerging from just above her ass and presenting a small curtain for Alita to navigate...but that wasn't going to get in the way of their fun.

If anything, it helped Alita come to terms with what she was doing: she felt as though she'd truly become a proper stallion, and as the flare of her new, equine length pressed up to the fittingly changed petals of Sephina's womanhood, she didn't think of the act as defiling her friend.

She was just breeding a desperate mare, and conveniently, blowing off the steam from a hard day of work in the process.

"Promise me that we...w-we'll get help after this," Sephina asked of her friend. She was trembling in her stance, feeling a growing mix of nerves and excitement from within, and knowing that the outward show of it was a warm, slow trickle of juices down the inside of her thighs.

Her body was giving all the right signs to her first stallion, down to the clitoral wink that she offered when the flare kissed against her transformed sex.

"Can't make any promises."

Alita's words should have driven up the sense of panic in Sephina, but their bodies were becoming more equine by the second, and their connection hastened the changes; the drive of a wide, powerful flare through Sephina's tight entrance and further into her body forced a heavy cry from her lips, even as their shape changed around her pleasured moans.

In turn, Alita couldn't keep her bliss to herself, but she didn't realize just how much she'd become like the horses she worked with: her posture shifted and lumbered forward before she rested her weight against Sephina, and the latter did a fantastic job of literally holding up her friend and holding still for her as thick, driving hips pounded into her ass with a series of quick, deep thrusts.

"Alita, I n-need...one more promise..."

The words were ignored; they never even made it to the ears of the transforming stallion, much less past her gritted teeth and winced eyes.

"Promise you'll...d-do this again... please... please say it!"

Panting rapidly, Alita struggled to make any sound beyond the tainted noise of her lungs firing on all cylinders; there was something decidedly equine about the way that she huffed and neighed her way through the last thrusts, but as she knew from years of research, that was simply how the act took place.

It was forceful, if not downright brutal , but for the short window it occurred, there was bliss yet unknown to either of the women in the apartment.

Sephina's clit continued to wink and spasm at the base of Alita's crotch, and as her body rapidly wore itself out, Alita stayed in place and felt the thundering pressure of her own cock leaping and bouncing around inside of her roommate's utterly stretched passage.

Already, Sephina was struggling to keep her palms spread on the floor, but she crumbled under the weight of feeling Alita's seed pump against her womb and flood it...but even when she collapsed, Alita stayed focused on the goal, keeping her whole length buried and pumping, until the heavy, swinging orbs that had descended in the middle of the action were satisfied with her sense of exhaustion.

A rapidly deflating erection slipped out of Sephina and sent back a flood of ejaculate with it, staining the hardwood floor between them and leaving them gasping; Sephina was exhausted from her transformation and satisfied with their romp, but she was finally set in the middle of the human and equine worlds, laying there as a woman that had retained all of her beauty, while taking on the thicker muscles, wider hips and unique anatomy of an equine.

In that sense, she'd passed Alita, who was almost a perfect blend of a human woman and a stallion...but she wasn't nearly as satisfied as her roommate.

She felt that there was one more step to be taken to cement her new form as legitimate.

**

Breaking into your own place of work might sound crazy, but nothing Alita was doing would come across as logical to anyone that caught her.

She took the full risk of breaking and entering, damaging company property and getting caught trespassing, all for the sake of something she never should have done.

"Sorry for scaring you earlier, Molly."

The sound of her hooves made a distant, echoing clop throughout the empty facility, and in the research bays, Alita would have nowhere to hide...but at the sight of a proper breeding mare, she completely lost her better senses.

Her new, full cock was already engorging itself again as she prepared to make a decision that she'd never be able to come back from...