A Centaur Surprise

Story by Binding Sin on SoFurry

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#13 of Proper Kinky

4493 Words

A little bit of an expansion of an off-camera scene from one of my D&D sessions... My gay-as-hell centaur had one person he wanted to bed, and the moment offered itself so perfectly. Too bad nobody knew about the side-effects...

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Contains: Transformation, bestiality, rough/angry sex, straight (but secretly very gay) sex, and traces of nuts. Viewer discretion is advised. However, if you want to read on, here ya go!


Zathum was a bit of a town bicycle. Well, actually, those hadn't been invented yet, so he was the village horse, but that was sort of expected. After all, he was a centaur. And as all adventurers with a dark past they didn't want to confront, he spent his doing regrettable things and refusing to pay attention to the consequences. Or, at least, they'd be regrettable to most people... to him, well, being a slut was fun!

Zathum's entire tanned body was covered with scars after his years and years as a hunter with his tribe, then a protector of the city after his tribe was slaughtered. That part in the middle... that's the part he tried very hard not to remember, spending as many nights under someone else as he possibly could. It, honestly, reminded him of home... After all, as the youngest member of the hunting group, when they'd had frustrations to work out, they'd wrestle him to the ground and work them out properly. And unlike most of the other hunters, he never complained to be the one on the bottom.

Over his years of self-isolation, partying, and generally trying not to remember the source of far too many of the scars that peppered his snowy appaloosa coat, he'd started to think of himself as a connoisseur of cock. A veritable sommelier of every form that most wondrous part of male anatomy could take. Which was what had him in his current situation.

His party had just come on a long, painful, agonizing trek through the hot and sticky jungles from an old ruin filled with danger and death at every turn. He was tired, his back ached from carrying all the stuff through all the miles of jungle, and his new wounds were not agreeing with him, even after they'd healed. In general, he felt like crap, but that wasn't the worst part.

The worst part, as always, was that, as a centaur, he couldn't reach his own dick, and he was pent up past the point of caring. He needed some love, a good rutting, to be filled to the brim... and his pickings were slim. Between the pipeweed and the heavy liquor that had flowed as his party met with this roaming band camped outside the city, he was fairly out of his right mind, but that meant that he could search through the options with only his base instincts to guide him.

But that was the issue: his base instincts wanted more. When the one that takes your virginity is literally hung like a horse, it was hard to find someone to compare. And he'd tried. Humans were alright, mostly because a lot of them had weird fetishes that he catered to, but they were just not large enough. And elves never had the power behind them. Dwarves were a little better, but the effort to get them high enough to do anything to him was more trouble than it was worth, and anything smaller... heck, even their arms weren't enough.

Orcs did alright, they could tug on his mane and really make him feel it, and lizardfolk had a certain charm about their scales, particularly when they got into the swing of things... Heck, at this point, he wouldn't even mind a tabaxi. Those claws raking through the fur of your back was just... he shuddered in need just thinking about it, and the way their barbs tugged juuuust right at his pucker... Now if only it was one or the other. THAT would be the perfect combo. Why weren't humans working on making half-tabaxis instead of all these half dragons and elves and orcs?

The camp was mostly humans, all part of this weird... well, honestly, they were a cult, but a harmless one. A few half-elves were among them, but that wasn't what he needed. He took another drink, feeling the alcohol really seeping into his system, and he sighed. At this point, he'd be willing to go to the stables... It wouldn't be the first time. But they didn't even have horses here.

He smirked, feeling his cock dropping free and his tail flagging already. It had been on _hell_of a party that had brought him stumbling into the stables drunk, and the fact that the horse had been coaxed into it... he still didn't know how it happened. But the feeling of that mounting, the feral beast biting his hip, the hooves on his back and that huge shaft spreading him wide... It had been heaven on earth. And even better than home.

The feral drive of that horse was so powerful, so all consuming... his body had rocked, the muscles rippling with each hard slap of the horse's hips against his. His tail had flagged to the side, pinned down, and he'd moaned and yelled out in sheer joy as those heavy nuts had slapped against his, his hooves splaying out to open himself for that huge ramrod that spread him wide. The medial ring pulled at his entrance, then pushed it in so beautifully, and as that flare had spread out...

He practically came just thinking about it, knowing his cock was throbbing under him and not even caring. There was nothing, absolutely nothing, in the world better than the warmth of his insides being flooded with hot cum. Thin, a little strange, but just so much... he wished he had known the name of that chestnut, or who had owned it... He'd have had to give himself as a guide. But waking up in the morning, the heavy warmth still inside him, the horse had been taken out... Didn't even say goodbye.

He chugged his drink, then looked to his party. They weren't much better. The two women were right out of the picture, though the one he was drinking with he did have questions for. Aurelia, the fey... She partied at least as hard as he did, and always had the best pipeweed, but she also had that feminine side that he knew he was missing for... important matters. Since he was the last of his tribe, he knew it was his duty to carry on his tribe's bloodline... and he knew women were involved in that, but he had no idea how. He hadn't exactly been in town much during those times, and he knew the anatomy was different, but... the mechanics were beyond him.

Still, that could be a matter for another time. He looked to the males of the party, his eyes roving over their form, his deep archives of sexual experiences ready to let him know if they were worth the time and effort. The human, he was too small and wiry, and didn't have any interest. Getting under him would be impossible. And the tortle? Well... He probably was hiding something away in that shell of his, but the sheer disdain that always radiated off of him and the sinister look in his eyes... he knew that was well past "claws in your fur" levels of pain.

That only left one option, the big, furry, hulking bugbear known lovingly as Grump. Goblins of all kinds weren't exactly known to be friendly folk, and Grump fit right in, but that was really only his shell. He was, for all his treachery and cunning, a dependable, noble person, and one who knew about the finer things in life. He'd been mad all day, stewing over something that had gone wrong earlier, and his muscles rippled with a power that Zathum, in all his strength, could only dream of... To be wrapped in those big, warm, fuzzy arms...

But the big issue was that Grump was straight. He'd hit on Aurelia, he'd been to a brothel and bragged about his conquests... and when Zathum mentioned he'd liked the playful ass-slapping that Grump had a habit of doing, they'd immediately stopped. Zathum snorted, feeling his pent up need under him. "I would give just about anything for one night with him..."

Well, the gods seemed to be on his side, for a moment later Grump went into his tent, then stopped at the door, turned around, and shouted "If anyone of you ladies wants to be on the receiving end of a very angry fuck, let me know. If not, goodnight." He then shut the tent and turned off his lantern, heading to bed.

Zathum groaned. "Why should ladies get to have all the fun? I'd take him up on that offer in a heatbeat."

One of the members of the cult looked around, then at him, a puzzled look coming to his face. He then wandered over, swaying a little from his drink. "So... you want a chance with him?"

Zathum nodded, sighing. "I do, but I don't think he'd be happy to see me like this. Even a disguise... maybe one of those potions or something."

The older gentleman chuckled. "I can do you one better. Just... relax." He raised his hands in a few practiced arcane symbols, then pressed them to the centaur's horse body.

Immediately Zathum could feel his body shifting. He was lowering towards the ground, his form melting like water into itself. Four legs (five if you counted the pole in between them) shifted down into two, hooves forming into catlike paws. His fifth leg disappeared entirely, rushing up into his body, the arousal staying at full strength, but the sensations so completely different. There was also an added weight to his chest, a heaviness he wasn't expecting, and fur began to sprout over his whole from, head to toe, instead of stopping at his waist. Even his tail extended out, flicking more with his control and emotions.

The whole process took mere seconds, but at the end Zathum stood on shaky legs, everything feeling so... different. He looked over at Aurelia, who looked astonished, then grinned. "You get in there and bed him, Z!" she said with a smirk. Zathum looked over at the wizard, who laughed, holding up a mirror. Zathum's strong jaw and tan skin were replaced with soft whorls of orange and brown fur, green feline eyes gazing at a beautiful, soft tabaxi face. Not something Zathum would really look at, but Grump...

The wizard patted him on the shoulder. "You've got one hour. Make it count."

Zathum's alcohol soaked mind took just a moment to look over himself, stretching his new two-legged form. It was... weird, not something he'd get used to, especially with those two fleshy weights on the front, but overall... it would be wonderful. He bent down, stretching high, his tail raising up to the sky and giving half the camp a good view of his new equipment. The very idea made him shudder and purr, a sultry sound in his new feminine voice. He winked at the wizard, waved at Aurelia, and confidently strode into Grump's tent, ready for the ride of his life.

Entering the tent his nose was immediately filled with the very male scent of the bugbear. He always noticed it before, sure, but something about it really stood out to him now, setting his loins on fire. He only just realized he was soaking wet down there, his lower lips looking almost hungry and needy, his whole lower half on fire... If this was always how women felt, he wondered how they focused on anything.

Even he lost his normally (ironically) catlike reflexes as he thought about the fire raging between his legs, missing Grump's entire reaction to him entering until the bugbear had grabbed him roughly by the neck, pulling him in close. "Well, you entered. I hope you're ready."

"Oooh~ Harder daddy~" Zathum moaned out, his claws digging gently into the fur on Grump's hand. The bugbear raised an eyebrow, then smiled wickedly. He undid the simple cloth he had covering his junk, letting the behemoth roll free, then growled dominantly.

"Let's start here. Make sure it fits." Grump lowered this mysterious female tabaxi to the ground in his tent, then a little lower, making sure she knelt right before what she had come in for. He figured an offer of angry sex would've sent the women running, and didn't remember a tabaxi in the group, but... he wasn't about to complain about free sex. If she didn't break in the process, she was definitely going to be walking funny, though.

Zathum certainly hoped so, his pupils dilating as his eyes locked onto that meat before him. Grump always had been huge, and Zathum knew it for all their traveling. Only Zathum was bigger, and he was literally hung like a horse, so being so close... The centaur-turned-tabaxi moaned softly, savoring every inch of the turgid length that bobbed before him. He breathed deeply, taking in the musk and feeling his whole body shiver and a hole he'd never had clench, a few drips of something that felt amazing rolling down his legs. He shook his head, then got to work, knowing Grump would take charge if he wasn't fast enough. He slowly started to lick up the long length of the shaft before Grump growled, a harsh hand curling in his hair and pulling his head back.

"Geez, with that tongue? No. Put that rough thing away and open wide." The growl only got more dominant, like a countdown on a fuse, and Zathum followed the orders eagerly, opening wide and relaxing like only a good sub could. His reward was his head being cupped in both of the massive paws of the bugbear, then slammed forward onto that cock, only a moment's notice between it touching his lips and swabbing his throat. The tabaxi gagged for a moment, trying hard to keep the tongue away, while the centaur in that body shuddered. He was used to a different set of muscles, and this smaller, tighter throat had him confused in all the best ways.

Grump brought her head back, surprised to see she'd kept everything down, though there were tears at the edges of this kitten's eyes. But he wasn't going to stop for that, especially not when she'd come in getting her musk all over the place. Honestly, no wonder she wanted it, the way she smelled right now. He continued to pump her head on his shaft, giving her just enough time to suck some air past his cock before shoving it deeeeeeep into her throat, until it bulged obscenely, her cute little pink nose tapping his belly fur.

Zathum was in heaven, even as drool flecked the edges of his mouth and tears streamed from his eyes. The world was getting a little blurry, but the sheer domination he was getting at the hands of Grump was beyond anything he could've dreamed. He could feel his pussy clenching, then he moaned and shuddered, the whole sound lost by the obscene wet noise of his throat bulging out once more. He groaned and swallowed, tightening around the monster in him while his tail twitched and feline honey flooded from his pussy, splashing across the grass. He saw stars, his whole body feeling wonderful beyond belief... but he needed more. His claws dug into Grump's hips, begging him to fuck him harder.

But the bugbear had other ideas. He chuckled, seeing, feeling, and smelling the effect he had on the tabaxi he didn't know was his party mate. If he found out... well, it was best not to know, but for now, he pulled her back off of his cock. There were dirty words to be said, teasing things to do, but he wasn't in the mood... He had a lot of anger to work out.

Zathum was practically tossed to the ground, sprawling on his back. He moaned, whining needily, the fire in his body only getting hotter, before he found himself pinned entirely under Grump's form. This was a new experience, the centaur too large and oddly shaped for that kind of treatment, but as this tender little kitten... He mewled needily, spreading his legs wide, trying to relax his ass for the incoming storm. Those huge hands wrapped around his neck, pinning him to the ground...

Suddenly lightning shot through Zathum's form, eliciting a needy yowl from the feminine feline as a completely foreign, new, and incredibly sensitive hole was penetrated for the first time. His brain didn't even know how to compare it, or what to do with the feeling, but it was shut down as he just moaned. His hands wrapped around Grump's wrists, not pulling them away, almost guiding them to his neck, while his whole body squirmed and squeezed in pleasure. That huge spire slipped in so easily, Zathum's pussy all naturally lubed, and he moaned like a cat in heat as every single inch of that massive rod was swallowed by his lower lips.

Grump seemed almost impressed for a moment, both at the sensitivity of his lay for the night and how much she could take, but that didn't stop him. He started to plow into her, his hips moving hard and deep, almost like he was trying to use his sack like a wrecking ball and break her open. He grunted and growled angrily, choking the tabaxi gently while getting all the tension and aggression weeks of walking had put into him. She was going to be a pretzel by the time he was done, but she knew that walking in, right?

Zathum was sure he'd died, because this pleasure was beyond any wet dream or living fantasy he'd ever experienced. Nothing could've compared him to the feelings rushing through his body, of being slammed into so hard, his body naturally pulling, suckling, wanting every hard thrust that shook him to the core. His tail wrapped around Grump's leg, while his claws dug into the fur on his arms. "Ah! Fuck me! Harder~! Don't hold back!" As though it was a challenge, the next thrust slammed him so hard his whole body shook, his pussy clamping down and milking that piercing spire for all it could do.

Grump's growls got louder as his rough mating continued, but since the pussy was asking for it, he was going to give it to her. He moved her legs until they were by her head, pinned by his body plowing straight for those incredibly hot depths inside her. He was plundering her whole form, giving her everything he had as he worked out all his aggression, his growls and snarls only met by her yowls of pleasure and cries for more. The whole camp must've heard what was going on, and he didn't care, slamming into her with everything he had as his cock started to spurt and throb.

Finally he slammed home, his hands getting tighter on her neck as he roared out his dominance, hot, thick, sticky cum gushing through his length and deep into her deepest, innermost chamber. On the other side of that length, Zathum cried out in pleasure, squirting around the length as his body milked it for all it had, his mind fogged from the lack of air, but in absolute ecstasy. The warmth pooling inside him, dousing the flames, filling him up and pressing so many spots... It was so much better than anything he'd experienced as a guy. He wished sex could always be like this, and the warm, fulfilling feeling afterward...

He didn't have long to enjoy it, though, as he was soon pulled up from the ground, Grump standing on the spot and holding Zathum's writhing form to his chest. Zathum gasped for air, feeling gravity pulling him down onto that cock, threatening to push into even the new, warmth-filled chamber deep inside him. But he didn't have to worry long as Grump brought him up, then crashing down, meeting the falling kitten's quivering body with a rough thrust up.

Zathum howled in pleasure, throwing his arms around Grump's back and digging in his claws, racking them up. "Oh fuck~! Oh fuck!" There were no words, no goading he could give past the sounds of his own body as Grump began to thrust up into him, standing and delivering in the most admirable ways. Yet another position he'd never experienced, and the way it held him spread so wide, filled so deeply... he envied those with two legs for all the positions he never could dream of being in.

Grump's brutal thrusts weren't done, though he was much calmer now. He wasn't going to choke out the tabaxi, even if she was now drawing blood on his back, but he was going to see if he could tear her in half. She was strong, stronger than he'd been expecting, but the way she was putty in his hands... it had a fire running through him while he worked to quench hers.

The polymorphed centaur could feel the cum drooling from his pussy, rolling down his ass and tail and dripping to the ground, and he whined. "Nooooo~... don't let it out. Fill me up~! Don't you stop!" Once again, his prodding was enough, before Grump started to truly bounce him on his cock. Zathum could only hold on, screaming out in pure pleasure as he was taken and ravaged, being used like a cock sleeve and loving every second of it. The dominant growls, the warmth inside him, the cock filling him so completely... Even the musk of his party member, so wonderfully masculine, had him shuddering and moaning in complete submission. He yelped out just once in protest, for a second, as Grump pulled his tail to use as a handle, and yet not a moment later he was crying for it even harder.

Even though Grump had just cum, he couldn't hold back, feeling her pussy massaging up his cock so wonderfully, begging him for more. As the splash of her arousal hit his balls, dripping with cum from his last offering, he flooded her womb again, painting her insides white until she thought she might be ballooning out, the excess all rushing over his balls and splashing over the floor. He panted, growling and then pulled out all at once, dropping her to the grass of the tent.

Zathum landed on the ground hard, cum drooling and gushing from his pussy, but he felt like he was made of jelly. He groaned blissfully, then started to get up, only to flop forward on shaky legs. His tail was high, showing off his creamed underside, and he was sure his time limit was going to be up soon as he crawled towards the tent flaps. Just as he reached them, though, a hand wrapped around his tail, and a dominant growl came from behind him. "I'm not done with you quite yet."

Twin sets of claws scarred the ground as he was pulled back by his tail, only for his gaping, leaking pussy to be plugged up once more by that cock from behind. Zathum moaned, then put his face down, knowing this position well, at least, even if it was a different hole. He wanted all that cum warming him to his very core, dousing any embers of the flame that was still burning inside him. He could feel Grump hunch over him, protecting him and claiming him all for himself, then those huge hands wrapped around, grabbing at Zathum's breasts.

She moaned and leaned into Grump's squeezing hands, making the bugbear smile as he played with her breasts. They could've been bigger, and he could picture them swelling, but with how much she'd withstood already, he figured she'd earned some fun. He teased her nipples, pinching them lightly, while he slammed into her raised ass from behind, pounding her into the ground in a puddle of their previous two sessions.

Everything happening to him made Zathum's body sing with pleasure. He never knew this was what he'd been missing, and now he had a new goal, if he could remember in the morning: he'd have to figure out how to be female permanently. As it was, he was too busy enjoying every second of this spell. Some part of him could feel the magic starting to wane and rush from his fur, but he willed it continue until he was filled again... He had to feel that cum rushing into him one more time.

Grump did all he could to make that happen. His balls swung pendulously, dripping with cum and feminine honey, coated in musk and sweat, while the cock above them spread its treasure wide, plundering it for all it had and ready to leave behind many more pearls of his own. He rutted hard and fast, wanting to make sure he was good and spent before she left the tent. Zathum just shuddered under him, clawing into the dirt and wishing this moment could never end.

But end it had to, three hard slams pushing his face into the cum pooling in the dirt as he was filled once more, feeling like a river had emptied itself directly into his body. He could feel himself squirting again, rippling around that cock, pulling for everything... but finally that fire in his core was gone. The arousal was sated, and the afterglow was beyond compare. He moaned, connected with Grump for a few moments, laughing internally at the almost gentle snuggles the homophobic bugbear was giving him in his feminine body.

But those didn't last long either. Much too soon Grump pulled himself free, looking at the mess of tabaxi and cum on the floor of his tent. "I'd ask you to clean up, but you'll just make a worse mess. Get out of here." He suddenly didn't seem to care, getting into his bedroll and sounding like he fell asleep instantly. Zathum missed the cuddles, but was thankful they ended as he rose on incredibly wobbly legs, shakily exiting the tent. Cum drooled and dripped from his pussy, all his fur caked in sticky white cum.

Not thirty seconds after he left the tent the magic failed, and wobbly steps on cat paws immediately became shaky hooves weaving him back and forth. His body was still coated in cum behind, and the centaur wasn't going to walk straight for a few days, but he felt amazing... He'd never forget this night, nor the warmth that still seemed to be settled at his core, like a memory of his previous form.

It wouldn't be until a few months later that he found out the other reason why he'd never forget the night... Quite the odd condition on a male centaur, but one he strangely welcomed nonetheless. Still, that would be a bridge to cross when the time came. For now, he almost made it back to the fireplace and the rousing sounds of applause from the camp before he hit the dirt and passed out a spent, happy horseman.