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Duke was beautiful.

Worse, he knew it.

The stallion stood tall, just under seven feet, with broad shoulders and a bare torso that solidified into a V towards his hips. Sweat beaded and ran down his short, soft hide as he leaned over, elbow on his knees, curling an impressive amount of weight with his right arm, then his left. His powerful biceps formed impressively large bundles of muscle with each flex of the horse's dark chestnut arm. Flashy red gym trunks rustled as he moved and shifted with each curl.

Duke's lips curled into a smirk as he grunted deep and loud, making sure to draw glances from other patrons in the gym's free weight room. Thanks to the floor-to-ceiling mirrors installed near the bench Duke chose, his sweating, muscular, toned reflection beamed into the consciousness of anyone who peeked.

After curls, he stood and did a few reps of lateral raises and shoulder presses, before returning to the bench, laying back to work his chest with a pec fly or ten. His torso went taut with each strain, each grunt, each smack of his hide against the vinyl bench, doing a good job of drawing maximum attention to his magazine-cover figure.

Duke's pointed ears remained still, though alert, ready to hear any whispers or gasps at his impressive physique. The stallion solid hide rippled over his muscles as he stood again, ready to move on to the next part of his intense exercise regimen: front squats. Duke liked front squats because it would cause his shorts to pull tight around his hips, showing off the heft of his package for a few moments before he straightened up again. Guaranteed to draw stares, the stallion knew, considering his maleness was as impressive as the rest of him.

Duke approached the squat rack only to find a small black feline using the equipment already. The feline was toned, but new to lifting. His bar wobbled over his shoulders a few times, belying a lack of technique in form. The stallion snorted and stuck out his hand, grabbing the bar from the surprised feline's shoulders and lifting it up into the air with a single arm.

"If you're not gonna lift right, don't lift at all," Duke said, staring down the bridge of his muzzle at the cat, who turned to regard him with a cool, indifferent stare. The stallion stepped forward, brushing the feline aside, and racked the bar before loading up several times the weight the cat was using.

"Sorry, but I'm not finished yet," the feline said, attempting to step in close to the bar to reclaim his spot.

"Yes, you are."

Duke's arm shot out, smacking the feline in the chest and knocking him down to the floor. The horse ignored the angry looks the feline and several fellow gym-goers shot his way. Paying patron or no, Duke knew real lifters like him took precedence over scrawny runts like the feline, who, rather than risk a confrontation, simply moved to another part of the gym, leaving the doors swinging behind him. One less person to get in my way, Duke thought.

In addition to the attention of the other lifters in the free weights room, Duke also attracted the attention of someone else.

A single large claw rested on a small rubber-padded joystick. When the claw pressed forward, the pinhole security cameras in the free weights room moved and shifted the view, showing a close-up of the rude stallion on one of the two glowing monitors on a large wooden desk. The desk was in the gym's upstairs office, reached via a spiral staircase near the front desk.

The claw - and the gym - belonged to Atari, who frowned at Duke's behavior. The stallion was getting out of line... again. Atari had warned him before to treat other gym-goers with respect, but it appeared their last talk had done little good.

The muscular white tiger licked his lips. Under his chair, his large white and black-striped tail swished lazily over the hardwood floor. Atari's claw shifted, causing the camera to pan down Duke's impressive backside. As the screen lingered on the stallion's rump, following the motion of the horse as he went through a series of revealing squats, Atari reached between his thighs with his other paw, shifting the weight of his impressive sheath and massive white nuts to a more comfortable position within his black gym trunks. The furry orbs swelled against his paw as he decided it was time to show Duke what happened to rule-breakers in his gym.

Atari glanced at the clock and noted the time - just after three o'clock - then leaned over the desk to grab his smartphone. He tapped a quick text to his manager on duty, then played with the security camera controls, watching as the manager delivered his request to one of the trainers. The otter trotted through the complex, into the weight room, and approached the horse, all covered by the tiger's security cameras. The otter waited respectfully for the stallion to finish his set, to which Atari nodded. Good to see his employees had respect even if some of the customers didn't. After Duke racked the bar, the otter approached and leaned in to speak a few words. The stallion shook his head, a look of anger on his face, eyebrows furrowed.

Atari allowed the corners of his muzzle to turn up in a smile as the stallion's arms flew around. The trainer remained calm and cool, merely shrugging at Duke's antics. The tiger made a mental note to compliment the trainer - Sean - later on. For the moment, however, he was focused entirely on Duke.

Eventually the stallion, glaring, stomped away through the room, into the hallway, and out into the front room. The spiral staircase shook as Duke climbed, stomping his hooves to signify his displeasure at being summoned. Atari switched off the monitors and leaned forward over his desk, chin resting on his paws, elbows on the desk. As if on cue, the door flew open, banging into the wall opposite hard enough to leave a hole from the doorknob. Duke slammed it closed behind him and glared at the tiger, nostrils flaring with every dismissive snort.

"What."

It was less question than statement. Atari raised an eyebrow. Duke was in more need of reform than he'd thought, to show this much disrespect.

"Everyone is welcome in my gym, Duke," the tiger said. "You're here at my leisure."

"Yeah, well get more squat bars so I don't have to wait for runts to finish before I can work out."

Atari exhaled slowly, closed his eyes, and spread his paws under his muzzle, as if to say, "Oh well."

"I have the best-equipped gym in town and you know it, Duke," the tiger said. "Instead of being patient or even helpful, you were rude to one of my customers. That's bad for business, bottom line."

"Maybe I'll just take my business elsewhere," the stallion shot back. "Any gym in town would want my business. Hell, I probably wouldn't have to pay at half of them. I'm good for business."

"Not my kind of business." Atari stood up and placed his paws on the desk in front of him. His tail swung slowly in the air above his chair, tense and partly coiled. "Tell you what, though. Go apologize to Mr. Smith and Sean, pay me for the damage to my wall, and we'll be square."

The stallion guffawed, though he kept his arms crossed over his chest, head high.

"Who's Smith? That shrimp cat? And Sean, your weakling of a trainer? They should apologize to me," Duke said, voice bellowing through the office. It didn't occur to the stallion that the walls were soundproofed, meaning nobody but the tiger could hear his outburst. "And as for your wall, fuck you. It's just as shitty as the rest of your gym."

Atari's muzzle broke into a wide grin. "Well, I tried."

"Tried what? What are you talking - gah!"

Duke stumbled backwards as the large white- and black-furred feline's enormously muscular body flew over the desk towards him, launched by impressive thighs that delivered enough force to push Duke back, slamming him into the door.

"What the fuck!" Duke gasped, the wind knocked out of him by the tiger's artfully-placed elbow.

"Time to drop you down a weight class, Duke," Atari said, his voice little more than a growl now.

Duke's nostrils flared and his eyes went wide. In his haste to confront the tiger and rage at him over what he viewed as the gym's failings towards him, he'd failed to notice the heavy scent of masculine musk throughout the room. The pheromone-laden smell was already in his brain, confusing him, especially now that the tiger was pressed up against him. The feline's maleness shoved into the horse's hard belly, grinding over the ridges of Duke's impressive abdominals. The flaccid sheath bulged outwards against the tiger's shorts as Duke tried to push the muscular feline away.

"Get off me, you sick... twisted... ungg..."

Duke's complaints ended in a moan as a fresh wave of musk washed over him. The stallion's nostrils flared wide with each deep breath, sucking in lungful after lungful of the feline's oppressive scent. He couldn't stop the twinge in his shorts. Within moments, his cock pressed outwards, pushing into the tiger's hard thigh, flexing against the rippling feline's firm body.

Atari smirked and reached for the back of Duke's neck. Pinching his hide at the base of his neck, the feline roughly pulled the stallion forward, then stuck out his foot, tripping the slightly taller male. Duke flew forward, landing awkwardly on his chest and stomach over the desk. He tried to push himself away, but Atari's huge paw spread over his backside, shoving him down. Struggle as he might, he couldn't get out of Atari's grip. Once he felt five needle-sharp claws pricking his shoulder blades, he stilled.

"Fuck you doing," he gasped, cock hanging out of the left leg of his shorts. "Get... get off me..."

"What's the matter, Duke?" Atari growled. "I've heard you say it yourself: you're irresistible."

The tiger reached for his shorts and jerked down the waistband. His sheath flopped out, held upright by a strip of white-furred skin attached to his lower belly. The fat white tube was as thick as a two-liter soda bottle, heavy and firm against Duke's lower back. The stallion, more confused than ever by the feline's overwhelming musk, groaned as he felt the tiger's huge orbs drag over the back of his thighs.

"Nnggg... gonna... get you... for this," he gasped.

"I doubt it."

Atari grinned as he shoved his hips forward, nestling his sheath into the cleft of the horse's red gym trunks, making sure the male felt just how big his growing sheath really was. The feline was more than a match for the stallion, whose erection was already fully hard and throbbing, lewdly tenting his shorts out. The tip poked through the left leg, dragging it up his thigh, revealing his slightly tan testicles.

The shorts weren't a problem for much longer. Atari yanked them down, tugging them over the horse's cock and letting them fall to the floor around his hooves. Inch after inch of ebon shaft pressed free of Atari's sheath moments later, writhing up the stallion's backside, warm and already drooling pre-cum. The clear seed smeared into Duke's chestnut hide.

Atari opened his muzzle a bit. He breathed heavier as his arousal grew. Then kept growing. And growing. And growing even more, beyond what should have been possible. The feline's huge length draped from the stallion's hips, up his spine, and over his right shoulder, still only half-erect, just enough for the tip to flex several times just next to Duke's shocked face. The horse stared, entranced by the size of the tiger's maleness.

Atari, for his part, kept sawing his hips forward, using the stallion's muscular body merely as a way to get fully hard and ready for what was to come next. He shuddered with anticipation, licking his lips and swinging his tail back and forth as his massive testicles grew as well, though not quite as fast as his cock - yet.

Low, hungry growls echoed through the room as his shaft thickened, heavy and hard, almost as thick around at its mid-point as the stallion. The squirming horse groaned with lust now, overcome by the musk, not to mention the sheer size of the tiger's endowment.

That made it easier for Atari to slide backwards, dragging his massive cocktip down the stallion's smooth back. The enormous crown fell down the back of the stallion's thighs, too heavy to support itself. The tiger growled, eager and lustful now, leaning forward to wrap his large paws around the moaning horse's lower calves, just above his hooves.

A simple thrust was all it took for Atari's huge shaft to slip over and around those shifting hooves. The tiger let out a few guttural groans as he shoved forward, quickly taking the stallion up to his knees.

Duke groaned as his not-inconsiderable horsecock jerked, flapping against the side of the wooden desk, splattering the floor below with splurts of pre-cum. His chest heaved and his belly shivered. Even when he looked back and realized where his legs were going, he couldn't protest; he could barely think for all the musk invading his senses, rendering him little more than lust and muscles.

Atari's legs stiffened. He leaned forward, groaning again, louder, as his engorged maleness suckled around the stallion's extremities. He leaned forward, cocktip slipping past Duke's knees. Both paws reached out, grasping the stallion around the midsection and pulling him upright. Gravity went to work, helping his cock pull the big male deeper. It was slow work - the horse was, after all, even larger than the growling, thrusting tiger.

Atari reached around to grasp Duke's swinging horsecock with one paw. The other clutched at the big male's powerful chest, massaging the stallion's shelf-like pecs eagerly. His muzzle pushed into the horse's backside as the big male slipped deeper. His hooves hit the base of the tiger's swollen cock quickly, stretching out the big feline's urethra as they went, before disappearing into his rapidly swelling testicles, once more prompted to stretch and squeeze around the incoming horseflesh. The outline of Duke's hooves, then his lower legs, stretched outwards against the taut white fur wrapped around the tiger's fat orbs, which shifted as they dropped lower, past his knees, almost reaching the floor by the time the tip of Atari's ebon shaft pulled the horse in up to the top of his thighs.

Atari groaned, keeping the stallion in that position for a few minutes. He liked the feel of his balls churning away, already going to work on the horse's lower limbs while pulling gently at the squirming, moaning male's hips. The tiger stroked Duke's cock, making the big stallion wriggle all the harder in his grasp.

"Ooooh... unnfffff... ahhhh!"

Ropes of sticky horse cum shot from Duke's shaft, splattering out in an arc before pooling on the hardwood below. The stallion's arms reached back, wrapping around the back of the feline's neck as an intense orgasm ripped through him. The tiger grinned and chose that moment to ease the haughty horse's midsection down into his swollen maleness. Duke's eyes squeezed closed as the rippling insides of the feline's cock massaged and gripped slickly over his spurting erection, fueling his orgasm and making him twitch from head to toe with pleasure.

The tiger shuddered as he huge balls spread onto the floor between his feet, churning and gurgling loudly. The stallion's fingers clutched at the tiger's neck, trying to maintain a grip on the pelt as he was pulled in deeper yet. The huge ebon tip flexed, bulging outwards, showing off the lines of the stallion's cut figure down to his heavy balls being dragged downwards through the bulging urethra. Duke's cock spurt thick jets, the tip still peeking out from the tiger's length, squeezed tight against the horse's stomach.

The squirming male barely struggled from that point. Waves of pleasure erupted through the stallion's body - or at least, what now remained of it - as the tiger's huge testicles swelled ever larger. The tiger wrapped his paws around Duke's wrists, pulling his arms upwards, over his head.

The tiger panted as he glanced at the clock on the wall over the door to the side. Almost forty-five minutes had already passed. The stallion's legs kicked, now mostly inside the bulging white-furred testicles, but the bulges and impressions in the smooth orbs quickly faded into sloshing. He pushed Duke down, moaning as his tip stretched hugely to wrap around the stallion's meaty chest, gradually, ever so slowly, dragging those impressive pecs down into the shaft proper. Duke's moans echoed in the room, accompanied by Atari's ragged, pleasured breathing.

It took nearly twenty more minutes for Atari to get pull the horse's head down past his flexing, drooling tip. Already thick white cum was pulsing back up the length, around the figure of the muscular stallion being drawn deeper. Only Duke's arms remained outside the tip of the tiger's meat, and soon enough even those disappeared down to the fingertips, grasped and pulled inwards like the rest of him.

The squirming male pressed outwards, wriggling against the constricting flesh all around him, but there was no escape for the stallion now even had he wanted to. The tiger's cock shrunk behind the horse, reducing somewhat in size, but at the same time ensuring nothing but cum could pump free from the ebon tip. Holding the horse-filled cock in both arms, Atari slowly made his way back around the desk he'd so easily vaulted over early, dragging his horse-filled balls along the cum-streaked floor between his legs.

Dropping into his chair, Atari spread his legs around his huge balls, lifting his feet to knead at them. The stallion's face pushed outwards from within his shaft about three-quarters of the way down the huge cock, which now reached merely to the tiger's ear tips. It kept shrinking, however, though even once it finished reducing, the throbbing stalk remained decidedly larger than it had been before. His balls, as well, shrunk somewhat in size, condensing and churning and melting the orgasming horse inside into so much spunk. Atari kept both paws wrapped around his cock all the while, sometimes even dipping his head to wrap his lips around the tip or lovingly lick his way up and down his flexing meat, massaging his cock, urging it to pull the horse completely down into his churning balls.

He groaned with satisfaction as the outline of the stallion's head disappeared into his sac. Fingers entwined, he took his time to tease his shaft as it bobbed in air, jutting beautifully from his hips, the tip reaching up past his pecs. The white tiger groaned, tail swishing rapidly, and shifted as a few splurts of vaguely horse-scented pre-cum splattered over his stomach, making a mess of his downy belly fur.

A sudden thought struck the tiger. He sat upright and scooted his heavy sac under the desk, aiming his fat shaft down, between his legs. It throbbed and smacked against the underside of the desk until he reached down with a paw to hold it in place. His other paw sent another text on his phone, this time summoning Sean, the otter trainer who'd delivered his summons to Duke earlier.

The feline's muzzle set into a wide grin as he waited for the slinky otter to arrive. Sean was a recent hire, only six or so months on the job. He was good at what he did, but Duke did have a point - the otter was on the slim side to be working the free weights. Fortunately, Atari had a solution to that problem.

Sean poked his head into the room after politely knocked less than two minutes after Atari sent the text. The rest of him followed and he shut the door behind him. The otter glanced around, expecting to see Duke, obviously ready for an argument with the (formerly) rude stallion. Instead, the only occupant was Atari, who leaned back at his desk smirking at the slim male. Duke's red shorts lay on the floor in front of the desk liberally soaked in clear fluid.

"Uh, you wanted to see me, boss?" Sean said. The otter's whiskers twitched as the tiger's heady musk quickly invaded his nostrils. He shifted back and forth on his feet, trying not to focus on the big tiger and the sudden lewd thoughts entering his head. Sure, he'd thought about the tiger, maybe even fantasized, but sleeping with the boss was just a sure way to get in trouble as far as Sean was concerned.

Atari thought otherwise.

"I wanted to thank you for the way you handled Duke earlier," Atari said, a lilting purr underscoring his words.

"Nah, no problem, boss," Sean said. He struggled to keep focused as the heady, masculine scent of the tiger's arousal sparked a chub to form in his shorts. "I... uh... sorry, what were we talking about?"

"We were talking about your weight class," the tiger said, "and how some personal training from me might do you good."

"We were?" Sean asked, eyes crinkling. "I thought... wasn't Duke here? Why... unnggg..."

The otter's shorts twitched noticeably. Sean slipped his paws over his crotch, struggling to hide his arousal, but Atari simply purred, lifted a paw, and motioned for the otter to come closer.

Sean's feet moved of their own accord, moving the slim male like a sleepwalker around the desk. His eyes widened at the view: the muscular tiger leaning back in his chair, taut t-shirt stretched over his huge barrel chest and belly, massive cock poking past his knees, legs spread around a pair of balls almost half as tall as the otter.

Atari grasped his fatness at the base of the cock and swung the tip over towards Sean. The tiger didn't have to tell the smaller male what to do. Sean leaned into Atari's enormous testicles, dimpling them with his knees and thighs. Both of the otter's arms reached out, dragging the tiger's cock down against his belly and chest, leaving the tip under his muzzle. He opened wide and pushed forward, managing to take the thick tip to the back of his throat after a few minutes to warm up.

The feline purred and leaned back, arms behind his head, content for now to let the otter do the work. Pints of clear pre-cum welled up from his tip, flooding Sean's muzzle over and over, causing a mess of seed to dribble down the dark brown otter's chin and chest, soaking his white t-shirt with the black outline of the gym's logo on the front. His shorts pressed outwards, a large wet spot at the tip of the tent. Sean pushed harder, standing and moving back a little to get a better angle on the tiger's monstercock. The otter struggled to open his throat around the feline's enormous shaft - it was simply too big to fit.

Or so he thought. Atari casually reached forward with one paw, dropping his palm over the back of the otter's skull, fingers spread. A sharp push and the tiger's meat broke through the otter's throat, filling it with pulsing, flexing cock. Thick spunk pumped with each throb, filling the smaller male's belly and then some over the course of the next twenty minutes.

And what a twenty minutes it was. Sean's eyes sometimes bulged out wide open, at other times squeezed shut with tears depending on how deep the tiger forced his cock down his willing throat. That single paw made it easy to throatfuck the squirming otter kneeling in front of him, and Atari made full use of his strength to pump freshly-churned tiger jizz straight into the otter's belly.

The tiger purred as he watched his employee quickly fill with fertile spunk. Where the otter's belly had been smooth and tight on his entrance to the office, it now bulged slightly outward... and kept growing rounder by the minute.

Atari moaned as the otter's throat squeezed and swallowed around his shaft. He shoved in harder, deeper, forcing the entire massive length down into the smaller male's body. Sean felt the hairs of the tiger's stretched white sheath against his nose and wriggled all the more, spontaneously cumming in his shorts at the realization he'd just taken the entire awesome length on display earlier.

From there, it was simple: whatever Atari wanted, Atari got. The otter managed to get in a few gasps of air when he could, but was fortunately a natural at holding his breath. His belly and neck distended as the tiger's paws dragged him cum-soaked muzzle down to the base, then dragged him right back off, until only the spurting tip remained against his tongue. The tiger used a paw to jerk a few particularly large and fresh strands of cum across the bridge of Sean's muzzle before driving his maleness back in, hilting roughly deep in the otter's flexible body.

Sean couldn't believe how good it felt. The muscular tiger's paws groped at him, handling him rough, using him, but the otter still shuddered and moaned, all the while gagging on the stalk flexing into his stretched muzzle. Atari grunted loudly and leaned back, legs stretching outwards. The tiger's paws dragged the otter forward, forcing him to do a near handstand over the tiger's cock. His legs dangled in mid-air, kicking wildly, until his whole body flipped forward. The otters rump and tail smacked against the big feline's chest, who promptly wrapped his arm around the smaller male's chest and humped even harder, driving his pillar deep and true over and over and over.

Atari's massive testicles gurgled and groaned, shifting as they busily churned away the last of Duke, breaking the cocky stallion down into a hot load of fresh tiger seed. All that seed needed a place to go, and the tiger's imminent orgasm meant Sean would be the intended recipient. The otter's cheeks and belly bulged even more as, upside down, the huge pole jerked and flexed inside him. His stomach grew even more quickly when the tiger came. Atari roared out with pleasure and shoved Sean's head down, hilting hard, holding the struggling otter in place as bursts of cum flooded his body, several times what his cock had pumped out earlier.

The weight of all that seed transferring to Sean's skinny frame should have caused him to topple over. Instead, with each blast of seed, the otter's whole body grew. Not just his stomach, which hung out with a new pot-belly, but his arms, legs, even his tail fattened up with muscle. Sean wasn't quite aware of this, as he was too busy fighting to remain conscious under the overwhelming nature of the tiger's orgasm.

Atari rumbled and moaned with lust as the otter's body squeezed and trembled around his shaft. He leaned forward, pushing himself out of his chair. He flipped Sean back, so that the otter endued up laying on his back, head tipped, arms reaching up to grasp at the tiger's hips. Atari pumped down and through, blasting the otter with even thicker loads, with the result the small male no longer so small. Pure, unadulterated muscle exploded along his arms and legs. His torso swelled, causing his fur to draw tight around the outline of his pecs and abs. His core tightened, drawing in some of the pot belly even as more spunk pumped through him.

The otter's muscles weren't the only things to expand in size. His hard pink shaft stretched painfully upwards, trapped in his suddenly tight gym shorts. The length started out a moderate size, but was now as thick as his forearm and approaching a solid foot in length, accompanied by orbs each the size of grapefruit. The fabric of his shorts wrapped around the testicles tight, holding them firmly against his flexing, growing thighs.

Atari groaned and pulled his hips back, dragging every inch of his maleness free of the otter's throat. Ropes of hot, salty jizz splattered over the growing male's face and chest, leaving him a mess, before the white-furred, black-striped tiger reached down and flipped him over. Straddling Sean was easy; trying to get his huge length lined up with the growing male's shivering, flexing rump was not.

Growling with built-up frustration after only a few moments of not having his cock deep in a warm, tight hole, Atari's paws wrapped around Sean's hips, dragging them up off the floor and against the tip of his flexing cock. The tiger speared forward, impaling Sean roughly, forcing almost a quarter of his massive stalk into the male underneath him before stopping.

Sean's piercing cry lit up the room, though the pleasurable noises he made moments later quickly drowned out whatever discomfort he'd momentarily felt. Atari humped in hard, fast, brutally pounding the otter's cheeks, spreading the male open. Sean's tail thumped against Atari's chest as the huge tiger leaned forward, heavy balls back behind his thighs, still churning and gurgling, producing more than enough cum to serve the otter with a second helping.

Injecting the Duke-laden seed straight into Sean's backside produced immediate results. His glossy fur grew almost half an inch in length. The layer of subcutaneous fat common to otters did little to disguise the ripples of new muscle building inside the growing male. After less than 15 minutes of constant pounding, the otter had gained almost six inches in height and half that in length, while taking almost half of the tiger's flexing erection.

That wasn't good enough for Atari. The tiger's tongue hung from his muzzle as his churning balls made his cock ache for release, despite the rapid-fire splurts of seed already causing Sean to cry out and cum and squirm beneath him. He sawed his hips back and forth, dragging his flexing maleness out from the otter's clenching rump, before shoving back in, both paws clutching at Sean's backside, holding him to the floor, making sure he took as many inches as possible on each thrust. As the otter's muscular new figure took shape, Atari was able to flex his cock deeper... and deeper... until, like the smaller male's throat, the white tiger was able to hilt his massive stalk fully inside.

That was all it took to set them both off. Sean's thickness, squeezed between his belly and smooth hardwood floor, poked past his stomach and between his pecs, splattering his chin with a few thick ropes of seed. Above him, the tiger's heavy form weighed down, holding his magnificent erection deep inside. The tiger's fingers dug into Sean's broadening shoulders as the second wave of orgasmic pleasure made him twitch forward, toes spreading, lifting him from the floor. His huge testicles rippled, pumping the churned-up muscle-stallion deep into the growing otter's rotund belly.

After the first few blasts, Atari's hips moved of their own accord, roughly thrusting and pulling back and thrusting in, hard and fast and sloppy. Cum dribbled freely from Sean's muzzle and rump as his stomach distended, covering up his thickness once more. He was well over a foot taller than when he'd entered the room and showed impressive gains in his overall musculature. The tiger's huge nuts shrunk somewhat as he unloaded inside the otter, making sure to pound the squirming male's brown-furred ass hard and fast the whole while, trying to get out every last drop, knowing it would make the otter even buffer, hornier, and willing.

Atari grinned and rolled Sean onto his side. The otter's muzzle was larger now, his face wider, his whole torso ripped and clean with muscle, though soaked in seed. The feline pulled the otter's leg up against his chest and thrust a few times from the side, enjoying the various noises Sean made in the new position.

It took another forty-five minutes and five more orgasms each to empty his heavy testicles. Atari's balls remained permanently swollen, along with his cock, now noticeably larger and thicker than before - he couldn't help but absorb some of the horse, after all - but the majority of the gains belonged to Sean. The stocky, thick hipped otter grew in height, of course, but mostly he got wider, almost three times as thick around as he had been before, and all of it gorgeous, rocking muscle, freshly grown and ready for use. The groaning male pushed his hips back against the tiger's thrusts, strong enough now to meet the tiger's hips rather than be nailed straight into the floor by them.

"Mmmfffff... what... what did you do?" the squirming otter asked.

Atari smiled, resting on top of his muscular new toy, enjoying how the otter's guts clenched and milked his still-flexing, hard erection, despite his balls being completely drained.

"Let's call it a promotion," Atari said, his voice dropping to a purr. He leaned down, teeth nipping at the edges of the otter's ear, which flicked to and fro in an attempt to escape the teasing.

"I love promotions," Sean said, sounding a bit simple as he was still heavily under the influence of the tiger's musk, and would be for some time.

Atari grinned and checked the clock. It was close to half past six, well over the trainer's allotted hours, not that Sean seemed to mind.

"Much as I'm enjoying plowing your tight ass, I've got a company to run," Atari said at long last. His paw smacked down against the muscle-otter's rump cheek, eliciting a groan. With purposeful slowness, Atari extricated his massive shaft from the otter's backside, dragging every thick inch free only when the muscular, smaller male groaned loud enough. Eventually his tip popped free and shot a few ropes across Sean's backside.

The tiger knelt up and slumped into his chair, cock hanging over his thigh, half-hard and dripping, chest rising and falling steadily as he caught his breath. The otter remained on the floor, cheek to the hardwood, rump cheeks spread and dripping, tail half curled over. His whole body throbbed and flexed, twitching with the aftershocks of many intense orgasms.

"Grab a towel, wipe yourself down, and hit the showers," Atari said, smirking at his trainer's muscular new body. "Get cleaned up, get something to eat, and then get your tight rump back here at nine o'clock sharp."

The otter carefully pulled himself to his feet and nodded. His paws clenched and unclenched as he examined his chest and belly carefully, paying especially close attention to his rock hard cock, still erect, swollen to nearly three times its original length and proportionally just as thick. He grinned at Atari, inhaled the tiger's musk deeply, and snagged a towel from a small shelf near the door. Atari watched on the security cameras, claw tip expertly maneuvering the joystick, watching as the otter's huge cock bobbed obviously beneath a small towel. The view in the showers was even better - not a single person could help but stare as the muscle-male strutted past, hard all over. It was enough to get the tiger's thickness flexing back to full hardness again as he watched the otter's rippling backside in the shower feed.

Atari licked his lips and picked up his phone. He waited a few moments, then read the confirmation text from his manager downstairs: "will cancel Duke's account right away, let me know if you need anything else"

The tiger smiled and slipped his free paw over his incredible girth. He did require something else, but he'd turn to the otter for that soon enough.