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Her Transformation Surprise

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Written by Arian Mabe (Amethyst Mare)

Commissioned by Itsbrookeduh

Jenniefer smiled, her head thrown back into the pillows, blonde hair framing her face like a golden halo. Her heart surged as her boyfriend, Matt, slid into her, his lips at her throat, kissing and lipping and suckling, teasing even as his shaft thrust.

“Oh... Oh, yes. Yes!"

It was a moment shared only between the two of them as he moaned above her, head swimming with lust. Matt didn't even think that he could have stopped if he'd tried, if either of them had even wanted to. He was light and lithe and more than willing to go all night for her – well, with one or two breaks, of course. He didn't quite have that much stamina and no one could blame him for that!

But she was as beautiful as she always was to him, fingers tenderly caressing her jaw, fingers playing across her lips in the moment before his lips claimed them for his own once more. He kissed her deeply, their tongues brushing sensually up against one another, deepening the kiss as he thrust and thrust. Matt's need rose but he could not cum quite yet, other desires seeking satisfaction too as she pulled back from him with a breathy moan, mischief, once again, dancing in her eyes.

“Come here, hon..."

He was ready to be there for her, to please her, to do everything that he needed to for her. His shaft slid from her hot pussy as he knelt before her, Jenniefer sitting up against the pillows piled at the headboard of the bed, feet pressed together, openly on show. Her nails glistened with purple polish, everything prim and proper and fresh, and he could not help but give her just what she wanted, pressing in close, whimpering, her feet between his hands.

“Mmm..." She rolled her head back, perspiration glistening alluringly across her chest, the sheets rumpled beneath her. “Yes... You know what I like..."

And he did, though it was something that indulged them both as his fingers and thumbs kneaded the soles and heels of her feet, dancing over the arches, just to be playful. His lips pressed in close, kissing each of her toes, inhaling the light, clean scent of them, shivering in delight at just how her toes wriggled against his lips and cheek. It was not something for everyone but something all the more lustful for how it was presented, her easy control over him, playing with him as if, even then, she had something more in store.

Little did Matt know that Jenniefer was not all that she made out to be during the course of that session alone, leaning into more, her toes squirming teasingly into his mouth as he suckled on them. His tongue played cleanly around her toes and down over her soles, lifting her feet to get into every last little spot that he craved and lusted for. He never once let go of her feet, not even as his cock twitched and throbbed, pre-cum dripping very lightly from the tip of his cock, so close to orgasm even though he had no physical stimulation adoring his shaft at that moment.

Soon. Not then, but soon.

Jenniefer wanted him all the more, groaning as she turned around onto all fours, though her head was kept proudly high. They were there for the pleasure, about that and only that, with her feet still pressed together, soles tucked towards the ceiling even as her toes dug into the sheets.

“Do me..."

It was crude and it was crass but nothing else could have had him thrusting into her so swiftly, filling her in doggy style position – the very best one for easy thrusting. The bed squeaked under them and Matt's heart surged, the feel of her feet still present on his lips, fingers tingling with remaining sensation. He needed it all, grunting deep in the back of his throat, lust rising, slamming in harder and faster, trusting her wet pussy to soften around him, to allow him to go as “rough" as he liked. Truth be told, Matt wasn't sure that anything he did would be too rough for Jenniefer – not with her moans rising in the bliss of orgasm.

He wrapped his arms around her as she climaxed, on the edge of his own, hands on her heavy breasts, hanging perfectly into the cup of his hands and the closing of his fingers. She moaned out his name and he powered into her, the slap of his hips on her wonderful arse all that he could think about, filling the room. Her sex tightened around him, though Matt did not notice as he bore in over and over again, moaning out loud as they took their pleasure together and he erupted inside her.

As his seed flowed forth in needy spurt after spurt, Matt groaned, fondling her breasts, cuddling in close, not willing to let a single moment go to waste. His bare chest and stomach pressed up to her back, curving around her as if their bodies were meant to fit together, though the moment was one that he would have to savour. As beautiful as the moment of finishing inside her was, it could not be drawn out longer as he tipped to the side, pulling her along with him as he spooned her on the bed, his fingers teasing and pulling at her nipples, gently stimulating them while the hard peaks rose ardently under his fingertips.

“Mmm..." Jenniefer's moan sent a shiver down his spine. “I have something for you though, sweetie... A surprise."

Matt's eyes opened again. He hadn't even realised that they'd been closed. But he'd find out soon enough all that she had in store for him, nuzzling into the back of her neck, her hair falling lightly across his face.

“I can't wait to see."

But what Jenniefer had in store would change everything.

*

He didn't expect her to take him to the zoo and rolled his eyes a little, grumbling, hands shoved into his pockets.

“Come on, Jenniefer... This can't be it."

Jenniefer, however, only cast him a glance back, her lips pressed together just a little bit too firmly as if there was something that she wanted to say hidden behind them. However, there were no words forthcoming as she led him by the hand through the zoo, flipping her hair back over her shoulder with a soft “hmph".

Was that for him? Matt blushed and scratched the back of his neck. It was never a good thing to put her in a bad mood. Maybe he should have been more appreciative of his surprise, even if he didn't understand it? He went along with her though, even as her stride grew short and clipped, taking him through into the keeper's area with a woman with shortly cropped black hair.

“Hi. I'm Lisa."

She didn't smile but she didn't scowl either, almost as if there was something more on her mind that day. “Lisa" sighed and shook her head, leading him all the way back with Jenniefer ahead of him.

“So... Is this it then?"

Matt flinched. The zoo was filled with rare and endangered animals. Was she really going to be so dismissive? He was too tongue-tied to stop her, as much as he felt that he should.

Lisa chewed the inside of her cheek, sliding her gaze away. Really, she was a woman who had much better things to do than to worry about them. She had the serums ready and was more than prepared to leave them to it while she caught up on a little “sitting down" time, which was scarce enough as it was at such a busy job.

“Right, well, let me get you started then. As discussed, this is to assist in the endangered species program and, obviously, your transformation will only be temporary."

They paused in a concrete area that was secluded from prying eyes, though that did not help Matt's comprehension at all.

“What?"

Jenniefer rolled her eyes, grabbing his arm.

“This is your surprise! We're going to help out here..." She leaned in close, brushing the shorter hairs back from where they curled lightly around his ear. “But in a kinky way! Hon, they're going to change us into donkeys, the mammoth ones, and then we'll be able to help out by..."

She pulled back, licking her lips, teeth digging lightly into the bottom one but only for a fraction of a second. Matt understood, however, heart leaping into his throat and tightening there, blood roaring between his ears, Lisa rocking back on her heels carelessly as she prepared the syringes, drawing up a strange, pink fluid into them.

“W-what? They do that on people – still?"

It was something experimental, something that he'd marvelled at in a medical journal somewhere, but he'd never thought that there was so much use for it, much less when it came to sustaining dangerous and rare species.

“I don't know..." He rubbed the back of his neck, a shake of his head betraying his hesitation. “This seems a bit extreme, Jenniefer, do you really think..."

“Come on, hon," she pleaded, hanging off his arm, putting her weight on him, her eyes wide and begging. “You can do this... It's just a little prick, it won't be that bad. And all the fun will be worth it!"

She missed the point of his hesitation and a scoff and a huff from Jenniefer had him agreeing, though Matt still didn't think he had thought through properly all that he had to consider.

“All of the ones here are people who've had the serum?" Lisa interjected, arms folded, a wad of gum between her teeth. “It's, like, not that strange... Everyone does it. They think it's fun, kinky... Yada, yada... You know the drill."

But Matt didn't know the drill, even if it was something that seemed to be far more common than he had given it credit for. They wanted him to fuck...Jenniefer as a donkey? Strangely, it didn't sound so bad and he would be able to help an animal species by mating too. That had to be a good thing, even if it went about matters in a very weird way.

“I'll still be...me though, right?"

He had to check, had to see, even though Lisa was already nodded, impatient and popping her gum.

“Yeah, yeah... That would be, like, illegal if we didn't change people back too. Look now, are you doing this or what? I'm better with animals than people, to be honest, and this side isn't my strong point."

The syringes, capped, were pressed into his hand and Matt swallowed hard as he went with Jenniefer to a more private room, somewhere even further away from prying eyes. It was painted on one bright wall with a jungle mural, though it was not fitting for them being donkeys, not in the slightest, even though it was particularly easy on the eyes.

Matt gulped and rubbed the back of his head but Jenniefer always got her way, grinning as she slid her hands up his chest, around to the back of his neck, pressing lightly there.

“Come on, darling...

He had to do it, had to show her that he was excited for her surprise too, though he didn't even really know just what Jenniefer was truly getting into. Matt's fingers traced down over her shoulders to her upper arms, drawing her in close as he kissed her fiercely, deeply, tongue invading her mouth where it was met with her own. He should have remembered, of course, that Jenniefer was not one to be taken advantage of in such a way, groaning softly as she pushed him back, eyes sparkling with wicked glee.

“No... Sweetheart, we don't have to only do it like this."

Matt groaned.

“Please... I've got to get ready...got to get in the mood. Can we have some, you know, fun first?"

Jenniefer drew herself up tall, though she could not appear put out, despite all of that. She wanted it too, drawing her button-up blouse off over her head, too impatient in the moment even to pause right then and there. Her heavy breasts seemed to roll forward for his attention, lifting into his hands, Matt squeezing, groping, groaning as his fingers even teased inside her bra to caress her nipples. Oh, how he wanted to pay them all the attention in the world, unclasping her bra so that he could bury his face between them, moaning lightly, kissing her soft, creamy skin, nuzzling lightly.

“Mm... Come on now, hon, give me more than that..."

She was demanding and yet all in a way that made Matt want her all the more. He closed his lips around her nipple and suckled it into his mouth, twirling his tongue around it playfully, though his need rose to stark attention. His shaft would not be denied, as much as he just wanted to pay attention to Jenniefer even then, nuzzling between her breasts, his nose tracing over them, lips tickling. Softness did not need to be superseded by any manner of coarseness or harshness, for Matt had an inkling that that was yet to come.

He didn't know, of course, the syringes there and ready even as she sat on a wooden chair, the only one in the room, sliding her jeans and underwear down, though he didn't get a chance to enjoy them sliding down her legs. Jenniefer murmured to him but he was already lost to her, sliding between her thighs on his knees, not even caring about the hard floor pressing up to him. Shortly, it would not matter one bit any more.

Matt fumbled with his belt, working it free, a whimper on his lips, though he hardly knew what he was doing in the heat of the moment. It was hard enough as it was to breathe, let alone to think slowly and evenly, dropping between her legs, sparing a kiss to her pussy, wanting to get naked too. He could have waited, taken his time, but her sex enticed him on, the hair there left natural and pleasingly short, easy to lead his tongue down to the soft heat of her pussy. Her sex glistened, already, with moisture as he lapped deeper, teasing his tongue inside her while Jenniefer huffed and rocked up to meet him.

“Ah, yeah... Yeah, baby, just like that."

She moaned out loud, trying to twist her fingers into his hair, though it was not long enough at that time for that. She could but try, rolling her hips up to meet him, over and over again, his tongue pressing to her clit and swirling around, drawing it lightly between his lips to suckle on it tenderly. Yet just as he knew what she liked the most, Jenniefer loved seeing her boyfriend enjoy himself too, drawing one foot up and wiggling her toes for his attention.

Matt knew just what she wanted, what she was offering, taking her toes into his mouth and moaning around them as he suckled. His jeans worked their way down, though no further than his thighs, revealing his shaft. His underwear was tangled up in there somewhere but he could not help but wrap a hand around his cock, rolling his hips and moaning out loud, his tongue flicking up and over Jenniefer's toes as if there was nothing else for him, at least in that moment, in the world. She had a way about simply moving that made his heart pound like nothing else ever had, more turned on than ever and groaning more and more for her all the while. It was a particular kind of craving and lust that Jenniefer could fulfil for him and Matt lifted her foot, letting the aroma of her wash over him.

Would something like that be more or less powerful when he was a donkey with her? And just what would that feel like? His hips rocked of their own accord, not knowing what he was doing, only knowing that his need was rising more and more even then. Her big toes were the biggest lure to him as he suckled on them wantonly, lifting her feet to his mouth both at once so that he could get everything that he wanted. His cock had to fall by the wayside with pre-cum glistening ever so faintly right at the tip, taking her feet in his hands, squeezing, massaging, doing everything that he ever pleased.

“Unff, come on!" Jenniefer shook her head, shuddering in place, though she wanted more. “You always spend too much time on that. Let's get on with it!"

Truth be told, foot play was not entirely Jenniefer's thing, too keen to get to the main event, even though she enjoyed toying with him at the same time. She wanted to indulge him but it was hard to think about something like that when she just wanted his mouth between her legs, or his cock in her. Anything would do, but the foot play, well... Sometimes it was kind of ticklish.

Obediently, even though his cock throbbed, he kissed all the way back up her legs to her pussy. He moaned as he buried his lips back between her thighs, sliding his tongue into her, need rising, as much as he wanted to please himself. It was all that he could think of, all that he could do, the chair rocking back on two legs and, thankfully, balancing against the wall, at least ensuring that it did not tip over and lead to an untimely end to their fun. It would all come in time, of course, as he pleased her, sliding his fingers into her pussy while he locked onto her clit with his lips, careful to vary sensation so as not to overwhelm her.

“Yes... Oh... Yes, yes... More, baby, more!"

Jenniefer threw her head back and cried out for him, though her need was such that orgasm was not to be held back. All she had in her mind was the thought of being turned into a donkey, of how hot that would be, how she could be bred, even, and take none of the consequences from that! How awesome! But her climax had her slipping even in the quivering, aching pleasure of it to the ground, rocking onto all fours and grinding her thick butt back to her boyfriend.

He knew just what she wanted as he pressed into her, moaning out loud as his bare cock sank deep. It filled her perfectly and yet he would have something even thicker for her soon enough, arousal peaking as he thrust madly, holding her breasts as he leaned over her back. Jenniefer grunted at having to bear his weight but she wanted it still, so much coming together all at once, their moans echoing off the painted walls of the mural.

“Yes, yes... Oh, yes, yes, yes!"

Jenniefer could not hold back her pleasure, though the floor was harder than any bed to rest on, aching through her knees and palms. It was not in her sense of comfort as she moaned out loud and cried out Matt's name, orgasm gripping her once again. Was that how it would feel to be bred and taken as a donkey too? Would she just be so horny that she couldn't stop, couldn't think of anything but breeding, taking and being taken? As he slammed into her, hips working furiously and bouncing off her buttocks, she rocked and ground back furiously against him, her butt rising, the flesh giving it the perfect round into which to plough.

Yet Matt could not hold back his pleasure, so desperate to cum after getting to please her and lick her feet that to hold back would have been completely beyond him. He cried out her name, squeezing her breasts, fingers digging in, leaving light indentations on her tits, though her climax was one that he was there to ride out. What he did not notice, however, was the two syringes rolling over the floor, Jenniefer's fingers groping and grabbing for them, scooping them in closer to her naked body.

She had a plan, oh yes... She had to do it, knowing that he would back out as soon as he had the chance. It was too hot, everything making her skin prickle and tingle, head twisting back and forth in ardent lust that could not be contained. Her passion rose and rolled as she twisted around at the very point that Matt cried out in ecstasy, his cock throbbing and pulsing as he delivered spurt after spurt of cum into her bare pussy. Of course, she was on the pill but that would not matter anymore when she was a donkey, her womb open to be bred, nothing to stop the cream of his thick seed from flowing deep, from seeding her full and impregnating her.

But she had to get Matt there first.

He jumped as something sharp stabbed into his arm, breaking the skin and pushing deep. What the hell was that? The grin on Jenniefer's face as she blew him a cheeky kiss, the plunger on the syringe already shoved all the way down, delivering a full dose of the serum into his veins, letting it flow forth. His eyes widened but the breath caught in his throat would not let him take a full, deep breath, shuddering back and away, pleasure twisting with a strange sense of anticipation.

Matt twisted and pulled back, words fumbling to his lips.

“What – Jenniefer! That's not fair, you didn't tell me you were going to do that! I thought this was just a kinky thing! I didn't expect you to..."

He groaned, rolling his head from shoulder to shoulder, panting and heaving as he sat back, jeans tangled around between his knees. The fabric did not seem familiar anymore as his T-shirt grew more restrictive, having barely taken any of his clothes off at all while she was completely naked. Jenniefer, however, only had a roll of her eyes in store for him, watching intently, perched on the chair with a faint trickle of cum oozing from her pussy. There was plenty in there to start her off with but she wanted more, always more, the true pleasure of being a beast of burden that was only there to be bred such a lure that she could not so easily turn her back on it.

And that was just why she had had to push him over the edge into it, taking advantage of her boyfriend, even though Jenniefer was sure that he would get over it. Maybe in time. She'd make it worth his while, even if he was being a baby about it, rather, holding out his arms, turning them over, staring at them with wide, fearful eyes as if he expected something terrible to happen.

“Man up, Matt!"

“Make it stop..." He whined, swallowing hard, insides turning liquid, churning and grinding against one another. “I can't... I need time, Jenniefer, just a few minutes."

But it was a mistake to think that something like that could be turned back so easily as the changes began, trickling through him, an itch tingling down his spine. There was no going back from it as he grunted thickly, rubbing the back of his neck, twisting back and forth, trying to scramble away even though Matt knew, truly, that he could not run from a transformation like that.

Jenniefer inhaled sharply. Taking her eyes off him was not in the realm of possibility while he groaned, panting and gasping, eyes bulging as he brayed. It was a cough of sorts that built and built, his lips pulling into a more donkey-like shape, softer and more pliable, flexible. Matt tried to crawl away but his body was already sprouting hair, growing larger, his legs longer, his arms stretching out and down, the bones cracking lightly as they repositioned themselves.

Yet there was not to be any pain for Matt as his transformation progressed, Jenniefer rubbing his head as his ears sprouted, pulling up and up into a donkey peak.

“There, there..." She was not convincing in being soothing, rolling her eyes. “I'll join in soon, you can fuck me then, baby. Won't that make it all better?"

Matt didn't know, his skin covered in dark fur that was not like the hair of the horses that he had known before. It was thicker and denser and not waterproof, thickening all over his face and making it hard to see for a moment until he grew larger, lifting his hands shakily only to find that he couldn't wiggle his fingers anymore. They pressed together, losing feeling, forming into solid, black hooves – not cloven like many animals. Shakily, he turned them over, the feeling of the triangular frog on the underside giving him more sensation, though his feet followed the same process, sliding over the smooth floor as he struggled to grip in his changed form.

He had to move, had to shift, his spine lengthening, though he didn't understand that part of it. Nothing made sense as his new flanks shuddered with harsh snatches of breath. Nothing at all, his lips quivering, forced onto all fours. His arms bent the other way, lengthening to match his hind legs, those joints tucking into hocks that seemed foreign on a creature like him too, as strange as that was. He knew something of the anatomy of donkeys and equines but no more than that as he groaned and chuffed another strangled snort, eyes bulging as his face too morphed slowly out and out and out.

His nose was long, so long that it left a blind spot in front of his nose that had not been there before: that would be something to get used to. His teeth were too large for his mouth as he groaned, chewing and licking at the air, though that was not enough either to get him out of the transformation. It was happening whether he liked and enjoyed it or not, rolling his head, nostrils pulling into an equine shape, grunting and groaning.

He was close to being a full donkey but so close... His tail pulled out just as his eyes changed, though it was Jenniefer that bore witness to that. From blue to dull, brown eyes with a changed pupil that was inherently donkey: it was the way of it. And yet what she did not know then was that the man inside slipped away too, the donkey grunting and braying, snorting and swaying his head back and forth, trying to work out a little of the tension from his body. But he could not have understood why it was there, not through any of that.

He, after all, was no longer Matt.

What no one knew, at that point, was that Lisa had gotten the serum vials mixed up when passing them to Jenniefer and Matt, getting out the ones that were experimental – permanent transformation. Those had been intended only for the most extreme cases, times when it was deemed medically necessary for someone, but it spoke volumes that they had never been used before. They were old and likely not to be used and, well, they had looked just like the next set to be brought out for the transformation program. There was nothing to differentiate one set of vials from the other and that was one thing that Lisa would blame on someone else later, when the time came.

Matt's nostrils flared but he snorted and huffed, shaking his head, his back rounding lightly into that donkey shape, with less of a dip in the middle than a horse boasted, typically. He brayed and sniffed dispassionately at the ground as his transformation settled over him, but a donkey did not remember that he had been human, of course, not when his mind slipped away. There was nothing more to be had of a man who had been permanently transformed into a donkey, the dullness seeping through him slowly but surely, softening all manner of humanity from his mind.

His tail tickled with hair thicker at the tip, hanging down as he flicked it. It was the best kind of fly-swatter, though he didn't need to use it at that time, his shaft retracting a little. Still, it mainly thickened where a sheath tucked down around it, soft and pliable. It didn't need to pull back all the way, for there was still some manner of arousal in his body to be had, groaning softly, swaying his head back and forth. His shaft became soft and dark-toned and fleshy, his balls growing – not that he would ever get the chance to appreciate how they hung there, so round and delightful that it was a shame, truly, that he didn't get the benefit of them.

He knew nothing of the world that he had left, sniffing curiously at the woman there, perfectly calm. She was not of his species but she had gentle hands that scratched up behind his ears and he grunted softly, eager to lean into her hands and her touch.

Jenniefer smiled, though it was all she could do not to bounce up and down on the balls of her feet, excitement taking over where it really should have, at least somewhat, been restrained.

“Oh, I can't believe it worked! I mean, I paid for it and everything but, you know – sometimes you just don't expect things to be that good, you know?"

She babbled, repeating words in her haste, lips parted, glistening with the faintest hint of moisture. There was nothing else for her, nothing else she could do, though her want for everything rose stringently, her fingers closing on the second syringe.

She didn't know that her boyfriend wasn't “in there" anymore, even if he was a donkey who had once been a man. There was something different there, something that had not been, but she only saw him as accepting what was going on, everything coming together even more wonderfully than she could have imagined it before. Jenniefer kissed his nose softly, over and over, brushing them softly down his muzzle to his cheek, though there was only one thing that she could do and that was complete the changes in herself to join him.

The needle slid in and out, delivering a shot of the serum directly into her vein. Her fingers trembled in need as she set the syringe aside, barely managing to cap the needle again as she got down on all fours, ready for everything.

But not even she could have anticipated how they would bubble up inside her as if something was twisting and pulling deep in the pit of her stomach. It was not painful, not in the slightest, but it was not something that she had ever had experience with before, her lips parted in a moan, arching her back as if she was trying to get her boyfriend to fuck her right then and there. The donkey, however, was not all that interested in her, staring only curiously and backing off, his ropey tail swinging. His shirt still strained around him, though it had ripped at the seams while his jeans had become disentangled from his hooves at some point late in the transformation. That minor detail had not been high on Jenniefer's lists of concerns.

Still...Jenniefer could not help but lean into it. She'd wanted it and she still did, seeing part of that donkey-cock still protruding from his sheath, showing off what he had to offer, if only she was brave enough to take it. And she was, no chance to go back once it had begun as the hair swept down her body, covering her completely, her back lengthening, tail sprouting, twisting and thwapping back against her own body. It was a strange sensation, so much so that she jumped away from it, pushing up onto her fingers and toes, knees off the ground, her legs lengthening rapidly along with her arms to keep them all even.

Jenniefer grunted, her throat constricting, though it was brief. Her words were taken from her as she willingly gave them up, braying and snorting, trying out all the new sounds that she could make. Donkeys seemingly had something like a chuffing bark too, nostrils quivering, and she would have laughed if she'd been able to as she tried to buck, toes skittering as they sucked back into her foot. They would not be needed anymore as they solidified into hooves, her fingers glued together, no longer pliable and usable in the way that she had been used to, things coming together strangely, her skin prickling.

Her body ached and she shook her head, her neck growing stronger and more muscled, just like Matt's, though it was hard to consider something like that right then and there. There was something drawing at her mind and pulling it away, her thoughts coming to her with greater and greater difficulty, though Jenniefer still did not quite understand just what was happening to her, why everything about her mind felt slow and dull, as if it was not really her anymore. Maybe she was just taking on more donkey-like traits that would help her along?

It seemed like as good a reason as ever but she was wrong, so very wrong. Only then did Jenniefer finally comprehend her boyfriend's panic as her hind end rounded out with more muscle, tail flicking, her shoulders growing stronger – though nothing there was the sort of power that would help her escape her untimely fate.

No...

_ _

Yet that was the last word that she would ever think as her eyes faded, dulling, becoming more and more animal, losing her intelligence. She brayed and squealed and tried to kick out, as unsteady as she still was on her new legs, losing her fingers, screaming inside. Out, out – she had to get out! Yet there was nowhere for her to go while she fell into the donkey's mind more and more, softening and fading, losing everything that had made her just who she was.

Her face bulged grotesquely, some part of her mind clinging to the woman that she had once been, as much as she could not hold onto it. Matt watched on, curiously stretching out his neck to nuzzle and lip at her shoulder, though her wither was lightly round and rising as she grew larger still, all the way up to the size of the mammoth donkeys that she had so admired for herself before. She brayed and sprung about, shoving Matt out of the way, though her clamouring was ungainly, skittering and kicking out, striking with her forelegs.

It was all to no avail, however, as the final vestiges of her human mind faded with the dulling of her spirit, killing the mentality that she had once held and leaving her as a mostly formed donkey, her sex tucking up under her tail, breasts softening and smoothing into her body, teats forming at a soft and small maiden pair of udders under her body. They were not breasts but they at least ensured that she would remain female, which she may have been glad about if she had had any of the mental capacity to remember what she had been before.

Matt, however, only saw a donkey before him as the light aroma of fresh sweat rose from her, though it was not strong enough to overcome the donkey musk of her, the soft feel of her thicker fur against his. He snorted and whuffled lightly at her hide, brushing against her, pressing in closer, wanting to know more.

Instinct took over as he sniffed her backside, smelling something there that the new donkey part of him wanted to know more about. He didn't think, not as a donkey, but he did snort and sift through her scent, tail swinging, hers lifting a little for him even if it did not get entirely out of his way. It was enough, at least for the moment as Jenniefer allowed him to explore her, at least appearing receptive to his advances, which was sometimes all that one such as him could hope for. Life as a donkey, of course, was going to be very different than being human.

Still, she allowed him to mount her, rising onto his hind legs even as his cock pushed out, a much thicker length dominating his mounting. Matt did not get to appreciate it, not in his state, snorting and grunting, his sides reverberating as he groaned. Yet everything was as normal to him as it could be as he pushed over her back, ears pinned at the flash of her teeth, for she was even more eager than him to be bred. Her body rippled with the pulse of being in season, knowing that she was in need, knowing that she was receptive, knowing that she needed him. More than that, simply did not factor for her anymore.

And that was just why Jenniefer braced for him, spreading her hind legs willingly to take that thick length into her sex as it winked around him, tugging and pulling around his meaty shaft. She grunted but it was all a sensation that she welcomed, her body taking pleasure from the driving thrust of his cock even though she was not technically an experienced breeder in the form of a donkey. Any transformed forms, of course, would be pure and perfect in all ways – down to the reflexes of their bodies. Her sex did not yet know how to relax around a penetrating shaft and would still take it all the same, instinct taking over in raw, feral need.

The humans were no more, everything coming down to the donkeys enjoying one another. There was pleasure to be had there, of course, but everything was about the need to breed, the need to mate, everything else falling by the wayside. Jenniefer grunted, trying to rock back against him, though there was only so far that the flexing of her hocks could take her, her body coming with greater restrictions. Only she did not see them like that, not as he thrust over and over, his teeth grabbing at her wither, her bristly mane, holding her in place even though she was there quite of her own accord. She only knew what instinct told her, how she had to tremble in place and lock her legs, keep everything still and quiet for his lust and pleasure.

He would breed her and her body knew what that would bring, the little foal that would be born in due course, wobbly and wide-eyed, coming into the world. It was all that her body wanted, knowing the need to breed, his shaft sliding slickly into her over and over again, her folds closing around him with passionate desire.

Maybe there was a little of the human left in there... Hiding in her nickers and brays. Maybe. But there would never again be any way at all to know, not when there were so many other things to take care of in her life, eating and sleeping, drinking and resting... Donkeys, after all, had few concerns for the state of the world and the stripping of her mind broke it down into something lighter and more pliable, the world easier to bear.

She had nothing to worry about. Nothing at all.

And neither did Matt as he thrust into her, slamming in over and over, gripping her withers, almost slobbering on her. She held herself in the perfect position for him, bearing down over her back, even as he put too much of her weight over her back to be comfortable for her. He didn't realise that it was the boosted levels of hormones in the serum that had his cock hard and showing fully so quickly, only seeing a jenny in front of him that needed to be bred. If he'd still known who he was, he would have found it funny that Jenniefer became a jenny donkey in the end.

He couldn't help himself, huffing and grunting as he powered into her, his larger muscles holding so much more power behind them before. He thrust and he thrust, single-minded in his intent, needing only the warmth of her passage as he thrust and thrust and thrust. There might have been other words at play if he'd still had his mind but that was not the way of it, not as her folds closed around him, the wink of her sex pulsing around him. Matt grunted and dug his teeth into her withers, immobilising the jenny under him as she braced and brayed.

Her pleasure coursed through but there was no way for Matt to know or even anticipate that that was what she was feeling. He didn't know, couldn't even care, but he knew that the need to breed was not one that he could hold back. Thrusting and thrusting, he powered into her, forgetting everything else, not even knowing where he was. With the slop of her sex tight around him, the heat of her milked him without Jenniefer actually having to do anything, need rising, aching through his body so very fervently.

It could not be held back and there was nothing in a donkey's mind either to even consider it, not in a moment like that. He thrust and thrust, powering in, but his churning, aching balls could not hold back their load as he brayed and erupted inside her. His orgasm was far more voluminous as a donkey – at least in comparison to how he had been before – and he kept thrusting and thrusting, cum splattering, through his orgasm. Matt did not know that more of his seed would stay inside Jenniefer if he slowed and paused, hesitating for a moment to let the full load flood forth, but he didn't care about that either. He just needed more, always more, slowing only when his orgasm tapered off.

Something in him wanted to stay there, over Jenniefer, but instinct bid him to drop as the jenny shifted under him. She grew restless in the aftermath, her body telling her that everything that needed to be done had been done. She turned and nipped at her own side, only knowing that she felt “strange", something itching, something tingling. She needed to rest, her legs quivering, though she would need to lock them if she wanted to sleep standing up.

Matt poked at her shoulder, though he didn't know what he was looking for, only knowing that he wanted her again. The scent of her pheromones lay thick and heavy in the air between them even as the door opened to reveal another woman, who had become a stranger to him, complete with a pair of headcollars in hand.

“Ah, I see everything progressed well. I'll take you to your enclosure and that'll be that for today. I trust you already put your affairs in order?"

Lisa led them off, both donkeys as amenable as they could be to being in a headcollar each. She didn't know that something was wrong, not yet, but the habitat that they would go on display in encompassed a small field adjacent to some other equine types and a big, open stable that was bedded down with a thick layer of straw, changed out daily. There would be plenty of clean-up work from creatures that large and Lisa grimaced lightly at the extra work that would involve. It was still better, to her, than dealing with the general public, at least, so she'd take the implications of poop scooping all day long.

Time passed, they ate, finding comfort in the natural motions. They settled into their enclosure and Matt bred Jenniefer again and again, mounting her repeatedly as his cock ploughed into her. It became such a normal occurrence to him that he even bred her a couple of times when she was no longer in season – at least until Jenniefer wheeled around and snapped at him, ears pinned as much as they could be, warning him off. She knew when she didn't want it anymore, a foal resting heavily in her womb already, the feel of pregnancy upon her in such a way that her protective and defensive mechanisms kicked in.

She grew fat and round, her stomach swaying with the weight of the foal. Jenniefer moved more slowly, more reluctant to trot, and Matt followed her around step by step, doting on her. He wanted her attention all of the time and there was no break to be had for her as she warded him off, guarding her personal space, regardless of how infatuated he was with her. In a way, some parts of their relationship were no different to how things had been between them before.

Still, her body birthed a glorious and beautiful foal, born wet and blinking into the new light of day after his gestation period. She nudged him to his hooves and allowed him to suckle tenderly, proving herself to be the very best mother as her teats and udders grew heavy with milk.

It was then and only then, when Jenniefer did not show the usual signs of reverting to human, that Lisa realised her mistake, sweating heavily, poring over the forms, her head in her hands, tearing at her hair.

“No, no, no, no..." She moaned, shaking her head, pressing down, though the cool of the metal workbench was not enough to ease the pain from her limbs. “No, this can't be... Oh, fuck, I'm going to be fired, going to be fucking fired..."

More than that, she would be up against the law if that was the route that they decided to go with her, making an example out of the one person who had gone and done fucked up one of the most important breeding programs that had ever existed. They'd put her before the court and lock her away for years for turning them permanently into donkeys – but she couldn't have that! No, no, no – that would be her life gone!

Thus, she lied through her teeth. She told them that, yes, she had made a mistake, but it was only about where the donkeys had come from. Everything else was fine, of course: they weren't really people in there. They were just endangered species that had come from another zoo for breeding. Of course, she was reprimanded for that, as extra care had been given to look after the humans in their bodies, but it was not a big deal, not in the grand scheme of things. Ultimately, the zoo had already gained a lovely foal out of it too, which was something to be prized and cherished for the furthering of a species that was struggling on the brink of extinction where they had no use anymore.

Of course, through it all, Jenniefer and Matt knew nothing, nothing at all. All they knew was that they were happy with their day to day lives, knowing of no past or future, only the present. Jenniefer raised foal after foal as Matt pretty much bred her as soon as she had dropped the previous one, their relationship so strong that the zookeepers could even allow him to stay in the same enclosure as her and the foal, which amazed them. Maybe it was their bond and relationship from before that had helped there but there was no way to tell and no way that anyone would ever know either. All the world knew was that they were donkeys and nothing more than that was ever questioned about them.

Jenniefer and Matt, trapped as donkeys, lived and mated as nature intended.

Never any the wiser.