Mestango
Mestango Written by Leo_Todrius Commissioned by Gotommax
A dull wind blew across the dusty plain, filling the air with a haze of brown that trapped the heat from the broiling sun high above. The land was parched and the buildings in the run down town were weathered. The wood had been cured by the sun and dust, every building worn down to the same shade of russet brown. Window panes were caked with dust and the horse troughs were covered with tarps to keep the water clean... but there was still life in the town. The saloon was full of people and farmers roamed the streets. Money was exchanged and light glinted off the handle of pistols hanging from the belts of every citizen. It was far from the bounty of the west that people heard about in New York in the dime novels. It was a hard land and people had to grow up quick... but with hard work and a lot of luck, people could get set for life.
Inside the saloon, a man as weathered as the town leaned back in his chair, taking a drink of whisky as he gazed out of the window, watching a pair of fifteen year olds with stubbled faces smoking and talking their way out of trouble with the Marshall... their hands rested rather near their pistols, just in case. The man had to smile, remembering back to when he'd been their age, getting in trouble with the law... before he'd been known as Dean "The Devil" Durango, he had been force to cheat and swindle and steal... but his salvation had come in hunting Mustangs, wild horses. Most he caught and tamed, offering them to the local community or selling them to the Comanche.
Dean's hand reached up to run across his smooth cheeks. He'd just shaved and it was always a fascinating sensation to have smooth skin. So few did with how much work it was to maintain. The hair on his head was short too, especially for someone in their thirties like Dean. A wide hide hat settled over his head. A long dark brown duster trench coat hung from Dean's shoulders, better to slow down bullets and keep the sun off than a lot of things. His boots were of the highest quality, but even they were worn at the edges... and his pistol was his pride and joy, well tended and seldom used... just the way he liked it. Dean drained his cup and set it down, about to call for another when the double doors to the saloon wobbled and a fifty year old stumbled in. His eyes were wild with excitement.
"Wild herd! Just past the old Johnson place! A huge wild herd of mustangs!" Gilbert Hale explained. Before the words had even finished leaving his mouth, Dean had tossed down some coins and moved past the old man. The deep soulful eyes of Dean's Apaloosa horse peered over as he emerged, the horse's distinctive white fur with dark spots making it look a little like a cow, though on the plains he could tell from a mile away which horse was his. The cowboy moved over and untied the horse before he pushed up and swung over the back.
"Come on Paint, we've got work to do." Dean said, using his heels to gently nudge the horse's ribs. Pain turned and bolted down the street, the two passing the sheriff and the Alder boys, both of which turned to watch Dean in awe. Dean considered to himself that he'd have to hire them as ranch hands one of these days. The cowboy left the town in the dust, heading across the plains toward the richer farmlands, where trees held root in sparse pockets and the air was thinner. Paint made great time, the landscape passing by at break neck speeds. Dean leaned low, reducing his air drag, though he reminded Paint to pace himself... he'd need his energy when they got to the mustangs.
Dean's bones ached from his hard life, but the thrill of catching the mustangs was one that he couldn't resist. Even as the narrowed in on where the herd was, Dean moved to prepare his ropes. Most needed to hunt mustangs in teams an army to take down the wild horses... but Dean knew all the tricks of the trade, every single one... and he was ruthless. It's why he had earned the nickname of "The Devil." As they moved past the Johnson farm, Dean slowed Paint down to a fast walk. The horse craved speed as much as he did, but spooking the herd before they were ready would be a huge mistake.
As the cowboy and his horse cleared the Johnson house they saw a large herd of wild horses in the distance. They were smaller than the ones back east but as sleek as hell. Their coats were dark, closer to the Spanish horses they had descended from in Mexico. Dean licked his lips, looking for good candidates, his mind reeling as it processed all the information. Paint's nostrils flared as he prepared to help his master in his mission. Ever so slowly, Dean eased Paint toward the herd, staying low on the saddle, keeping a low profile. He had his rope at the ready, trying to scope out the best target.
Paint took Dean into the herd and the herd's movement adjusted slightly. They had been grazing on the long grasses and fallen apples just past the Johnson farm, but as Dean moved into the herd they started to move, shifting away from the houses. It was an instinctual reaction; Dean had seen it a hundred times... They could feel something was different. Dean remained motionless on Paint, relying on his horse to get him into the core of the herd. With growing speed the herd of horses moved away from the house and onto open pasture land and with every step Dean was surveying those around, trying to find the perfect candidate. Really, any would do but the thrill of the hunt was to find the best horse to tame... But something was off, something was different.
With a growing sense of confusion, the cowboy tried to settle in on what was different. He looked at all the differences of the horses... Hide, size, gain, width... until he noticed that the head of the herd was being led by a horse larger than all the others. Its coat was as black as the dead of night, its head several feet taller than the others... Broad shouldered, long backed. It was the biggest horse that Dean had ever seen... and while he knew it would have been easier to try and trap any other, he knew that his fortune could be made by capturing and training a horse of that size. With the most subtle cues, Dean started guiding Paint through the herd, making their way up to the front. The unnatural jockeying of positions caused the herd to move even more, picking up just a little more speed like a school of fish, but foot by foot Dean was making inroads, getting closer to the strange black mustang.
As Dean got closer to the mysterious horse, the confusion he was feeling grew rather than shrank. The horse's muscle groups were different... completely different. Its hips and knees looked strange, his shoulders were different... Even its neck was shorter by just a bit. Despite the changes, its stride was great, its hooves were big, it really did look healthy. Dean swallowed, realizing his good fortune. He had found a new breed of horse, a completely new kind... All he had to do was trap t, to saddle the mysterious creature and museums the world would argue over the find and how much it would take to get him to part with it. Dean threw caution to the wind, seeing his future ahead of him.
With a series of gentle signals, the cowboy directed Paint in closer, narrowing the gap bit by bit. Slowly Dean leaned up off the back of the horse, causing several of the wild mustangs to back up. The cowboy started moving his lasso and tossed it with precision, but the shadow horse moved to the side at the last moment. As the rope hit the ground, the herd erupted into a panic. Mustangs broke off in every direction, breaking into a full gallop while the lead horse shot off across the plains.
"Yaw!" Dean shouted, and Paint bolted off too. The thunder of a thousand hooves echoed across the plains as dust kicked up into the air, leaving the homesteads behind. They crossed Mackineley creek and sped past the old wagon trail. The sun was slowly descending toward the horizon, making progress for its evening slumber but Dean was not lost yet. Up ahead the plains started to climb into hills, rising up. The perfectly even terrain was disrupted by carefully placed rocks... Dean knew the land well, it as holy land to the local tribes... A place where the souls of the ancestors remained... but Dean couldn't lose the black horse, not when it could change his life.
Paint shot up the slope of the hill after the black beast, but they weren't alone. A good portion of the herd had followed, zig zagging, wanting to stick together but too afraid of the human to know what to do. Dean wasn't just having to focus on keeping up with his target, he was trying to keep from being bowled over by the wild herd. He kept shouting at Paint, encouraging the horse to keep going, to keep running. They took a sharp turn and caught up closer to their quarry, close enough for Dean to try again. A second rope was brought out and readied, swinging through the air as Dean built up momentum, keeping one hand on his saddle. Paint evened out, lining up the show. Dean pulled his arm back to throw the lasso... and a massive shadow lunged from the side.
The cowboy hadn't had time to even process what had happened. He had been knocked off his saddle, landing on the hard dirt, rolling down the hill several feet before he came to a stop. He panted and then tucked himself tight, knowing there was a stampeding herd all around him. The ground trembled beneath him, but no hooves came. After some time, Dean slowly opened his eyes. He looked around, seeing only one horse... but it wasn't his. Dean froze, realizing that the deep brown horse staring right at him was just like the one he had been hunting; strange muscles, bigger size... but the most terrifying thing to Dean was the massive log of meat hanging from the monster's groin... Its long, hard cock as thick as his arm, the flared head wide and leaking pre... the horse tail swishing in anticipation.
As the monster took a step toward Dean he knew he was finished. He closed his eyes and made a quick prayer, but as he whispered amen, the whinny of Paint broke through the air. Dean looked, seeing Paint lunge for the monster, trying to free his master. Dean felt conflicted, heart warmed that his horse had come to his rescue but sad that Paint was in danger. The monster reared up as most horses did to trample something, but rather than hitting Paint with its front legs, the impossible happened... the monster started to wrap its legs around Paint, like arms.
The Appaloosa let out a terrified sound as it was grabbed. No creature had ever been able to but the monster threw Paint back, grappling it like a wrestler. Paint and the Monster wrestled, frantically swaying and sliding, hooves digging into the earth, muscle glistening in exertion. Paint gave the monster a run for his money, bucking like a bull... At first it appeared that the monster was losing its grip, his arms sliding down along Paint's back, the horse appearing to get away slowly... but Dean felt a streak of terror rip through him when he realized what was really happening.
The monster horse's eyes glimmered with lust as its huge cock slipped around Paint's ass, smearing feral slime into his white and black fur before the monster member lined up with the horse's pucker. Paint struggled to get away from the alien sensation, but it was all for naught. Dean watched in heartbroken shock as his horse was violated, unable to look away as the monster's meat disappeared into the horse inch by inch. Paint let out an ungodly noise of shock, trying to get away, leaping and struggling, but the monster's grip was too strong. Every time Paint jumped, the monster pulled the horse back, the two frantically mating. Dean looked away, closing his eyes. The monster forced itself in and out, sliding back and forth, its shaft glistening with pent up cream. More and more was leaking out, coating the monster's shaft and pouring out of the horse's ass. Paint kept trying to struggle, but as the monster slammed into the beast's prostate, Paint was losing the battle. Blood rushed into his own horse hung member, the penis inflating, stretching, weighing down... and starting to drool itself. Inch by inch it swelled, larger than ever before.
"Oh Paint, my poor horse..." Dean whimpered in sadness when he caught a glance, knowing the heathen monster had tainted his horse for the love of penis... but Dean's mourning was interrupted as he heard a deep creaking coming from Paint's body. The horse's bones were shifting and changing. He watched in growing horror as the muscles beneath Paint's white and black spotted fur began to morph. Some muscles grew, others changed. The socket of Paint's front legs began to change, becoming more complex and allowing for greater movement. All four knees began to warp, picking up a new shape to give more flexibility as well. The long thin legs swelled wider and thicker with new muscle resembling biceps and triceps and calves and thighs.
Paint's neck shifted, the horse's head moving up and down around, the horse struggling to adjust to its changing body... but more than anything else, the horse was growing... Longer, wider, taller, there seemed to be no end in sight. It was almost as if the monster horse was inflating it. Paint let out a whinny, but the sound was different than ever before... There was depth, feeling, confusion. The Appaloosa gave one last blink as an animal and opened its eyes as a stallion morph. Paint reflected on his life, his existence... and the cock mounting him. His front legs moved like arms to brace himself, starting to push back against the assaulting cock, licking his lips in delight, his own cock swaying as it surpassed the girth of a normal horse. Dean had to hold back a curse, knowing he was seeing the devil's work before his very eyes. His own horse had become one of the monsters. He knew he had lost Paint, but he hadn't yet lost his life.
Dean rolled over onto his stomach and began crawling down the slope, using gravity to speed up his progress and to diminish how much they could see of him. Even as he crawled away, he could hear the wild and sloppy mating going on behind him... thrusts, slurps and splorts. He tried not to think of it, he had to get to safety. With any luck he could get to the bottom of the hill and be in the clear, the horses so far had reacted naturally, even the beast trying to get away with him. They wouldn't want confrontation... Even if he had to walk back all the way to town, he could at least get out alive.
Having made it half way down the hillside, Dean dared to push up onto his legs, breaking into a run. His boots pounded down the hillside as he picked up speed. The horses had all cleared the way, lingering well up into the holy grounds. The cowboy gazed at the stones ahead, knowing he was that close, that he was almost there. A grin started to cross his face, a grin arising merely out of the fact that he had beaten the odds... but it was premature. In mid-stride Dean felt the ground suddenly tremble before him as the black beast rumbled forward, blocking his path. It turned to face him, gazing at him with a fierce intelligence.
Dean skidded to a stop, not sure what to do. He gazed forward at the black beast, trying to determine which path to take. He'd studied countless mustangs, but none had ever presented him with the problems he had. The monster was intelligent, confrontational, capable of moving as fast as a horse and moving as carefully as a human. It was huge, it was muscled... Dean had never seen pectorals or abdominal muscles as precisely honed as on the beast... and his equine shaft had to be at least twenty two inches long, jutting out above orange sized balls, dripping yellowed feral horse cum... The same tainted sperm that had converted his horse into a monster.
The cowboy knew he had to escape before the horse killed him. He took a step to the side but the beast did the same. He stepped back, as did the horse. Dean waited, took a long breath, then faked to one side before sprinting in the other at full force. Dean's feet pounded the dirt for all he was worth but the ground shook beneath him. The black horse cut off his path and he spun around, only to see the brown horse was there, still leering, cock fully erect. Dean spun a third time... only to reveal that his last hope, his last path was cut off by his own horse... Paint's cock was bigger than ever, his ass dripping with tainted cum, his body boasting a mix of human and horse muscles. The horse snorted, inhaling the air for the first time as a fully sentient beast.
Dean pushed his loss and mourning from his mind, focusing on survival once more. He broke into a run, knowing it was futile... but he had to try. His boots pounded against the ground and the world around him seemed to operate in slow motion. He had only made it seven steps before he felt the hot, muscled arm of a black horse slide around his stomach, pulling him off of his feet and knocking him to the ground. Dean's back hit the dirt and the wind was knocked out of him. He sputtered and coughed, looking up. The horse was standing on three legs, having used one of his arms to move him. The cowboy had little doubt that if the horse's anatomy was just a little different, they would have been able to stand on their hind legs. As it was, having use of arms was a terrible advantage.
Dean tried to roll away but the horse's leg came down to block his path, the other moving to keep him from rolling the other way. More hooves came down by his head, trapping him between the legs of the black horse. Dean panted, still trying to reclaim his breath but each draw of air into his lungs brought with it the intense musk of the horses, how they smelled of sweat and sex and exertion... Dean looked up at the monster mustang's black hide... It was marvelous in all the right ways from the sheen to the thickness. It was bitter irony that the best mustang the cowboy had ever seen was a monster that would likely end him.
As the cowboy's eyes drifted down, he once more spotted the big horse's member. It seemed even larger than he had first expected... Without either of them moving, he could make out every inch, every contour... It was a long tube of meat with a flat head flaring out at the end, the piss slit wide and round like the bone in a good steak. Beyond that, the entire length was as dark as the horse's hide... Solid black darkness, a rod of ebony with a medial ring that ran around the center... and it was just above Dean, wobbling there. Dean knew he couldn't get out from under the legs; he couldn't roll or crawl to safety. So he merely remained there, laying for a long moment. After a while Dean started to wonder if the horses would forget about him or let him be, but just as he started to have hope he felt the side of the horse leg pushing him, rolling him onto place.
The cowboy was rolled into his stomach roughly before the arm slipped under his stomach, lifting him up so his ass stuck up into the air. Dean whimpered, praying harder than ever, pleading with the almighty. The other mutant horses moved around, reaching under the black monster to try and help. Their hooves scraped at his jacket and managed to tug it off, working next on his pants. Despite the agility of their arms, their hooves were practically useless and clumsy, though having them run down his back over and over was enough to make Dean welcome anything but being bruised to death. Dean toyed with his belt buckle, unclasping it and tossing it aside. He knew he was crazy, but the horses would have kept digging, kept trying...
With the human's belt off, the horses let out snickers of delight as they caught the edge of his pants and tugged them down. Another few movements of their legs and the human's bare ass was revealed. The horses nearly jumped in delight before the black one moved in. Dean grunted in dismay as he felt the hot, hard horse cock rubbing against his ass. Thick yellowed sperm began spreading over the cowboy's cheeks, the wide head pushing between them to try and get to the pucker beyond. Dean clenched as hard as he could, fighting the horse every inch of the way. The horse cock found his tight ring of muscle and tried to push in, but when not one centimeter managed to ply the pucker, the horse let out a neigh of dismay. The other horses moved but Dean couldn't see what they were doing, at least not at first...
As Dean tried to figure out a way to freedom, one of the other horses reached under the black monster to stroke at its huge shaft and balls with its hoof. The stimulation seemed to help and suddenly Dean was overwhelmed by a thick wad of cum splashing across his ass. A lot of it ran down under his groin and dripped from his sack, but a huge glob stuck to his pucker, infusing him with heat and then a tingling sensation. Dean shuddered, trying to resist but as the tingling spread into his muscles, his pucker started to relax and spread. Ever so slowly the cheeks of Dean's ass parted, revealing the cum soaked pucker... and then it too began to spread. Inch by inch, the small pucker was spreading wider and taller to make more room.
Once more the black monster pushed forward, its cock head plying against the muscles of the captive human's growing pucker. It tried a second time, then a third, starting to stretch the flesh more with each attempt. Dean called out in absolute shock as his pucker was stretched to the limit. Even with the effects of the sperm, he'd never been a quarter as large as he was becoming and the change was still continuing. The horse thrust back and forth relentlessly, never taking the cock head from Dean's ass but letting the pressure rise and fall dramatically. Dean's fingers dug into the earth, trying to summon strength from anywhere. What Dean got instead was the most unsettling and... erotic feelings of his life.
With his anus stretched to the limit, Dean let out a growing yowl of shock as his pucker was spread over the full head of the monster horse. It had been saturated in sperm but even now it was close to tearing. Dean's heart beat erratically as the two were pushed to the limit, but as the horse eased forward, Dean's pucker slipped over the wider rim of the equine head and clamped down on the shaft below. The hardest part was over and Dean nearly collapsed, but even in his limp state, the monster wasn't satisfied yet. The cowboy let out a loud howl as the monster eased forward. The mating had begun.
Even with the thick yellow sperm as lube, the horse cock entering Dean's ass was beyond anything he could even imagine. An inch slid in, then another and another. It just kept going, sliding between his cheeks and into his guts. There was no end in sight, the massive tool just flowing in and in, pushing through Dean, rearranging his anatomy as the warm tingling spread through him... and then the cowboy's stomach suddenly distended, the shape of a horse cock pushing against his belly. Dean was so shocked that he let out a chuckle, unable to hold back... The image disappeared from his flesh as the horse pulled back, sliding out almost all of the way before it thrust in again, taking a fraction of the time. Dean was lurched forward by the thrust, then tugged back by the retraction. Feeling more confident, the monster started to thrust back and forth with growing speed.
Dean was buffeted forward and back like a toy, his entire bottom half being used for a fuck sleeve. Dean tried to hold up to the thrusts, there was still a chance he was going to survive.... If he could only hold together. The black horse was relentless, sliding back and forth. Dean closed his eyes, trying to picture himself anywhere else, although the assault to his ass made it hard to think of anything else. Every so often the cock would graze his prostate, sending an unwelcome wave of pleasure through the human. Dean blushed in disgust, trying to remind himself how wrong the heathen act was. It was blasphemy... and as much as Dean wanted to live, he started to consider the merits of death. At least they would get him out of the current situation.
As bad as it was for Dean, he had been thankful that it had just been the one horse. At least that was his opinion before his breath of air was suddenly filled with the hot wet tip of another horse cock. Dean sputtered and pulled his head back, the goo sliding down across his lips. He spat through the slime, trying to get it away from his face before it got in his mouth. He opened his eyes, letting them clear before he realized that the brown horse had laid down, sidled up close to the black horse. Its huge cock was sticking through the black beast's front legs, the head bobbing right in front of Dean's face. Dean tried to look away but the horse thrusted its hind quarters forward, the thick equine head sliding across his cheek, smearing more of its tainted seed. Dean kept trying to turn his head to get away from it, but with one carefully timed thrust the horse hit its target.
Dean sputtered as his lips were pried apart and the horse cock made it as far as his teeth. Sensing the warmth, the horse was unable to hold back. A thick tangy musky salty flow of hot horse cum sprayed through his teeth and filled the cowboy's mouth. He tried to spit it out but more was flowing in by the second. Dean's only choice was to drown with lungs full of cum or swallow... and he was out of time to choose. The cowboy opened the floodgates and took a hearty gulp of the seed, just to get rid of it in hopes of breathing before long. As the hot sperm flowed down his throat, it brought with it a steady feeling of tingling that was now filling him from both ends. Dean kept guzzling the cum down, mostly because it was his only hope to be able to breath at one point, but a small part of him loved the taste... the raunch... how wrong it was. As much as he tried to fight it, the motions of Dean rocking back and forth were starting to become far more even and regular as he got into the swing of it all.
Dean's thoughts were slowly growing muddled. His consideration of just how wrong it all was disappeared... in fact Dean didn't think of anything for a long moment. He was reacting only on instinct. The cowboy was rather horrified when he realized that his brain had been working on some sort of automatic response for several moments, but the horror was forgotten as his mind drifted again. He guzzled more and more, his bones feeling warm as his stomach filled to the brim. The black horse was releasing more and more spurts as it approached its true climax, its initial cum pooling deep inside of Dean. Dean guzzled it down his throat, but even his ass was starting to clamp around the huge shaft, trying to stimulate the aggressor even more.
Just when Dean thought his lot couldn't change any more, he felt a hot wet surface slide across his stomach before it found its target. Dean couldn't maneuver himself to look, but he already knew precisely what had happened. Paint had dropped down onto his front legs and pushed his head beneath the black horse, looking for cock to please... and he had found the shaft of his master. The tongue slurped through the bush of hair and across the shat, covering it with saliva, slowly working the length to full arousal. Paint eased forward just a bit more, his horsy lips parting to accept the shaft.
Dean let out an overwhelmed grunt, one that was far more rooted in pleasure than any restraint. It took several moments to get right, but before long the cowboy was bounding between the cock in his ass, the cock in his mouth and the mouth around his cock. It was the perfect trifecta and all of his hesitations and doubts were being broken by the situation itself. There was a wide variety of sounds from around Dean. He heard every breath and grunt and snort the horses made and every so often one of them would let out a whinny or neigh of pleasure. Their animosity had melted and they seemed almost like docile tame horses as they worked in mutual pleasure, using the human. Dean had tried to resist for so long but as the sweat beaded across his pale skin, he was thankful... and truly ashamed that he felt that way.
It had been by complete accident, but Dean was starting to feel more fulfilled than he had in the rest of his life. He was pleasuring three massive beasts, every inch of their bodies working toward the same goal. He arched his back, trying to keep it fresh for the amazing beasts he was connected with... but somewhere beneath all the pleasure and contemplation, a new sensation was building. It had started deep in Dean's ass, but the tingling was moving through his entire body. Dean was convinced it was the heat of the cum and the pressure of the cock filling his entire lower body, and in a way it was... but the sensation was building far beyond that. Ever so slowly the cowboy's body was changing and shifting in the most peculiar ways.
The first visible change came in the nature of his ass cheeks. The flesh inside of them was evening out, rounding them in a much more steady fashion. The hair across his cheeks was starting to spread out, becoming more uniform. In moments it was a soft downy coating, but that was where the subtle sensations stopped. A sickening pop came from Dean's hips and he nearly collapsed, only managing to stay aloft thanks to Paint's mouth suckling on his shaft. Dean's hips ached so much that he could barely think straight and the sex didn't help either.
The pops and pain continued as the cowboy's hips continued to change. The bones moved, the muscles shifted and his legs repositioned somewhat. His range of flexibility was decreasing, keeping his legs rather straight compared to his body, but more than that the point they felt most comfortable was no longer aligned with his spine, but perpendicular to it... The pressure Dean had felt being on his hands and knees died away as his hips changed. It felt far more natural than ever before...almost tantalizingly good. Dean gasped suddenly in relief when his hips started aching, but he only had a moment before the sensation returned in his shoulders instead.
Dean felt like he was being ripped apart. The only solace was the cock in his mouth. He wrapped his lips even tighter around it, forcing his head around the cock. Inch after inch slid into his mouth until his cheeks were wide, his throat relaxing as the cock rubbed against it. Thick ropes of tainted sperm flowed down his throat and he couldn't hold back in the slightest. Even the pain in his shoulders was dwarfed by the bliss, though that was no small feet. Bones and cartilage popped as sinews and muscles reorganized. Just as with his legs, his arms now felt more comfortable extended before him, sticking out toward the ground as his spine was left far from it. Dean tried to dig into the dirt to brace against the feelings but his fingers were so stiff he cold barely move them.
Somewhere in the back of his mind, Dean knew this was wrong... that he was changing. It was unnatural to be on all fours serving horses at both ends while another sucked him down like a stein of beer... but at the same time it just felt so right... Dean shuddered though as the sensations in his spine started to grow stronger and stronger, the pain surpassing the pleasure. His gulping as interrupted and suddenly cum spilled from his lips, dripping to the ground. He grunted in agony as his spine stretched, the vertebrae pushing apart before they actually swelled. His nervous system sent off sparks of twitches and random sensations before he ribs creaks, sliding apart to make more room.
With the growth taking place in Dean's stomach and back, it was only natural that his shoulders started to stretch wider. Bones creaked and popped as they widened, his collar bone changing. His skin and muscle was spread tight, but soon the muscle began to burn and tingle as if the growing bones weren't enough. Dean coughed out more cum as his pectorals started to swell and his nipples hardened, his abdomen pushing into a series of numerous bumps. Dean let out a howl of pain, much to the dismay of the horse trying to pleasure itself with his mouth. The cowboy's body stretched, passing six feet tall, then six foot three, then six five... Soon his legs were aching as well, his upper legs growing longer, pushing him up taller from the ground. Dean's arms soon followed suit, the forearms stretching more and more.
Knowing his humanity was slipping away, Dean tried to keep a grip on what was going on, to hold onto anything... but his fingers weren't working anymore. Despite the cock probing his mouth, he managed to look down in time to see that his fingers were growing together. The skin had connected, the nails were spreading out. He let out a whimper but that was all he managed before the brown horse wedged its cock deep into his mouth, assaulting his entire face. Dean was forced to guzzle it down, his lips wrapped tight as his fingers changed into hooves, growing wider and spreading. Even the heels of his feet had melded away, shifting his future center of balance to the front of his feet where his toes had likewise fused.
As strange as Paint had seemed in the midst of his transformation, the cowboy seemed far stranger. He was monstrous in his own ways with his long skinny limbs and disproportionate muscle. Dean writhed, trying to call out but his scream was muffled around the cock wedged all the way to his throat. Slowly Dean's neck began to extend, his head rising up beneath the long body of the black horse. One of the monster's paws moved to rub Dean's side gently, almost comfortingly. Dean's heart melted a bit, touched by the sign of affection... at least for a moment. Still, he was trapped between two horse shafts and a horse muzzle, working his body... and his body was losing its ability to resist even for short periods. In a perfect act of instinct he was bouncing back and forth, sliding one cock in while the other slipped out, then moving right back.
While Dean's stomach had distended from the presence of such a large maleness before, his longer torso diminished the effect. What seemed distended as time went on were Dean's flanks. His hips had splayed out, his pelvis had widened and his legs were wider set. Even his butt cheeks seemed larger, wider and taller to compensate. In fact, the cowboy's ass was growing so big it was almost as big as a horse's ass... Dean shuddered once more, letting out a muffled neigh as his shoulders stretched wider again, his changing arms and legs gaining even more muscle. While the cowboy's changes had been largely overt so far, a much more subtle change began to sweep over his body. The hair on Dean's arms and legs started to grow longer and softer, the hairs darkening as well. New hairs were pushing out as well, growing denser by the moment until the cowboy's skin started to disappear beneath a thickening layer of hair.
While Dean's arms and legs got more wooly, his face was changing too. Unlike nearly every man in the wild west, he had managed to keep himself clean shaven. Before he'd picked up his nickname he'd been called baby face by vagabonds and bankers alike, but that smooth skin was being spoiled. Soft, deep brown stubble was pushing out of his cheeks, snaking across his chin and his upper lip, but as the stubble emerged, it was growing darker. Not only that, the hair on his arms and legs and even his head was shifting from brown to black. Streaks swept through his hair before the entire mop was black... though the hair on his head was starting to change just as much as the rest of his body.
While the hair along the center of Dean's head grew longer and thicker, the hair along the sides of his head was growing shorter if anything. The thickening strip seemed almost like the ceremonial crest of the Mohawk Indians... though as the base crept down Dean's neck, the strip growing down more and more flesh until it reached his shoulders, it was rather obvious that his hair was becoming a mane. Without warning or comfort, Dean's tailbone began to stretch and push out from his spine. New portions of bone filled in as muscle struggled to keep up. The tail pushed out inch by inch, reaching half a foot in a matter of seconds as deep black soft fur began pushing out all over the extension. It flicked around, the hairs growing longer, the inner core of the tail disappearing before long.
Dean's heart was racing faster and harder than it ever had in his life, almost like he was running for his life even yet... but his body was changing just as much inside as it was out. His heart was growing, his stomach was changing, his lungs were swelling... every part of his anatomy was shifting. Dean had horse hooves, monster joints, huge bones. His mind was torn between the fear of the new and the liberation of it. He felt o amazing, a strange sense of contentment welling up inside of him. He still continued to suck and be fucked by the amazing horses, but his own changes were picking up speed.
Every time the cowboy pulled his head back away from the brown horse's cock, his lips seemed to stay right where they were. Every thrust, each attempt seemed to pull his face out a little longer. His jaw bone extended and his upper lip and nose followed suit. After a moment of surprise, Dean started to repeat the process as a sort of a game. His face kept stretching, his teeth growing and flattening to accommodate the change as well. Even his tongue grew. Before Dean's very eyes his face stretched into a muzzle, the stubble coating it glistening in what little light made it beneath the behemoth body of the beast... but it was spreading.
Dean watched the stubble spread over more of his face, sliding up over his nose and brow before it moved out of his sight. In truth the fur was surrounding his eyes, crossing his forehead and sweeping over his ears. As they were covered, the round flesh started to throb and pulse. Soon his ears were pushing up, deforming into points as they stretched little by little into tear drop shapes. With his new muzzle, Dean's nose flared out, melting down into the extension until his nostrils were part of the rest of his face. His skin became tougher, still coated with fuzz as he snorted, inhaling the musk of the beast he was mating. Never before had Dean ever been quite so eager but he sucked and slurped the horse cock in his maw with a renewed vigor.
The sun had hit the horizon, filling the skies with oranges and purples and pinks, but still the stallion morphs worked at their new recruit. It was much slower changing humans than changing horses, but it was so much more gratifying. Dean's ears continued to rise up above his head into tall points, the stubble covering them completely, his head covered in the soft black fur. His eyes spread out and grew dark and deep like the others and Dean's senses started to melt away. His priorities of money and liquor all faded... though his craving for sex heightened more than ever before. Dean sucked and slurped with his horse tongue, his dark black pucker working the cock in his ass from beneath two giant fuzzy black cheeks. His tail swished, his hooves stomped. He was becoming a new sort of beast, but his change wasn't yet over.
As the black fur continued to spread over his ribs and stomach, the last of his changes were taking place. His ribs finished spreading, his legs finished, his back was as broad and wide as a horse. If anything it was harder than ever for Dean to fit beneath the massive black horse, but his hips were lifted just enough for his manhood to be revealed every time Paint pulled back enough. While hard, it was still distinctly a manhood. The shaft was pink and small, hardly anything worthy of a stallion morph like themselves. Above Dean he heard the snort and whinnies of the black horse. Paint pulled off his shaft and rose to his feet, backing up. Dripping with saliva, the cold air felt like a shock to Dean's system, but the shock only lasted a moment. The cold was suddenly blasted away by a deep and intense heat coming from his own shaft as it began to throb.
The cowboy shuddered as his balls began to throb and stretch growing to the size of plums, then apricots, then oranges. His sack grew leathery and tough before fur spread over it, but his cock seemed more out of place than ever. Still the pulsing pleasure and heat radiated out from it... and then Dean let out a whinny of his own. He shuddered in awe as his cock suddenly felt completely soft again even though it was as fully erect as he had ever felt. More blood surged into the tissue and his cock began to grow longer and thicker, jutting out more every second. Before long Dean's hips were thrusting involuntarily as his cock passed seven inches, then ten, then thirteen. The meat stretched by leaps and bounds as veins marked its surface.
As Dean surpassed a foot and a half in length, it was as if his cock had hit an invisible barrier. The mushroom shaped head stopped growing even as the shaft increased in size, causing the flesh to flatten and flare out into a wide cock head just a bit larger than the shaft itself. Dean let out a whinny around the cock in his mouth, basking in bliss as his maleness surged even longer, reaching twenty four inches, then twenty five. Splotches of the pink began to turn, shifting to black. For a moment it appeared that Dean had a mottled cock, but the black spread and soon his shaft was subsumed by the new color. As Dean's cock stopped growing, reaching its final length... Dean could suddenly feel that his body had stopped growing, had stopped changing.
The sensation was surprising to his system, overwhelming him like the hardest alcohol. He was no longer a human, he was a stallion morph. He had a horse head, a horse body, a horse cock and tail. He was one of them Dean pulled back off the cock in his mouth and let out a loud whinny as his orgasm ripped through his body. His brand new cock pulsed before the last drops of his human cum sprayed out, followed by thick ropes o the tainted yellow sperm. Sensing that his mission was complete, the black horse rose up to its feet and slid out of Dean's ass. With a soft plop, the massive black meat came free. The horses stepped out from over Dean, moving back until he was alone. Dean shivered a bit, unused to the cold on his fur but soon he was managing. He forced himself up, rising onto unsteady legs. It took a moment, but soon he was standing on his own.
Much like the alpha stallion, Dean's fur was a creamy inky black like the night itself... though he was the smallest of the horses; there was still a chance for that to change. Dean took a few steps, then a few more before he broke into a stride. The brand new horse circled the others with glee and freedom, though something was still weighing on his mind. More than anything, it was weighing on his massive horse cock. Dean let out a frustrated snicker, desiring more than anything to have sex with the amazing beasts around him. Dean took a deep breath and looked around before his eyes settled on Paint... his former pet. The former cowboy took steps toward Paint before he turned, looking to the black horse, his mate. The large beast gave a nod of his equine head and Dean turned back, surging toward Paint.
With eagerness, the new black horse dropped to his front knees and slid his long black muzzle under Paint's belly. He licked and nuzzled the white and black horse's fur before he turned on his real prize. Dean's long equine tongue slipped out of his lips and he gave the horse's shaft a big lick, savoring every contour and edge. It was so thick, so long and so delightfully creamy. Dean parted his lips and slid them around Paint's cock, taking it in, sucking every drop of frizzled cum it had to offer. Not being able to unleash in the changing human, Paint was far more pent up than the others. The Appaloosa shuddered as spurts of cum started to flow into Dean's mouth, only to be greedily swallowed.
Seeing his newest creation having such a good time, the leader of the Stallion morphs moved over. His equine nostrils flared as he took in the scent of the new horse. He smelled Dean's tail, his back, his ass... Everywhere he either smelled Dean's new scent or that of the herd. The large black horse nuzzled Dean's tail aside before his long tongue slid out; slurping at the new horse's balls... but slowly the tongue migrated up, toying with Dean's pucker. The leader could still taste his own essence in Dean's ass, just as it should be. Even if Dean was pleasing Paint, the former cowboy belonged to the master as his mate.
It didn't take long for Paint to cum, giving Dean swallow after swallow. When the new horse had guzzled down every drop and licked the Appaloosa clean, he pulled off and licked his muzzle, taking several quick strides around, his new cock still achingly hard beneath him. A slow sense of pride dawned in Dean's mind. He was so proud of his hard horse cock, his pride and joy, the source of his pleasure. Dean ran around from stallion to stallion, licking and nuzzling them as his heavy cock swung and ached to release his sperm. He was such a stud, such a stallion in his own right... but the others rather liked to see him so hard. It was befitting of what they were... wild horses, wild males, wild mustangs.
The larger black male turned and let out a snort, flicking its tail before it moved to catch up with the herd of wild horses. Beneath his legs his long shaft still hung proudly, fully erect, drizzling the tainted seed. He looked out to the wild mustangs, knowing that one by one they would all become stallion morphs like him... and that his brothers would help him. The brown horse followed the leader, his own erection so heavy it nearly dragged the ground. Paint followed just behind, prancing just a bit to show off his equine girth. Dean leaned down, nibbling at some grass to get a taste of it before he looked up and saw the other horses ahead of him, all of their asses waiting for his corrupting seed, crying out to be filled and changed. He broke into a full gallop, catching up in short order. They moved into the rest of the herd, helping to guide it on their search for a good place to bed down. It was going to be a very long night to say the least.