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The sun was setting on the last day of Michael's family reunion. Activities appropriate for the whole family certainly weren't Michael's idea of a good time, but the hulking rhino was glad he had decided to spend the afternoon basking on the beach with the rest of the clan. Admittedly, this was partly because it allowed him to frustrate his siblings with his choice in swimwear: a blue speedo that barely contained his junk, and certainly did nothing to conceal the rhino's hugely muscular body. Seeing their expressions of self-righteous exasperation as he sauntered across the sand would have been enough to justify the whole endeavor, but there was another bonus to coming down to the beach with his family: he got to watch his hot nephew running around in a tight pair of green swimming trunks. Despite being only sixteen, the kid was fit as hell, and seeing him in this state of undress was quite enjoyable. The way his developing muscles flexed and moved as he ran, the way his trunks clung to his firm ass and prodigious cock and balls. It all had a very particular effect on Michael, something the growing bulge in his swimsuit could attest to.

Running one hand down his defined, hairy abs, Michael scratched his thick bush of orange pubes before reaching down to stroke his swelling cock. He massaged his penis, slowly and deliberately, just enough to encourage a bit more blood to flow into the meaty appendage. The rhino pinched one of his nipples as he squeezed his thickening dick, forcing a small jet of pre out and into his suit. Now semi-erect and sporting an extremely obvious, slightly damp tent, Michael decided he wasn't going to wait any longer to put his plan into action. The massive rhino grunted as he got up from his towel and called out to his nephew.

"Hey Sam, I think I'm gonna' head back to the room!" Michael said as he stretched, his hairy muscles perfectly defined in the afternoon light. "Feel free to come up whenever!"

Looking back at Michael, Sam gulped. He could see his uncle's suit bulging obscenely.

"Okay, Uncle Michael! Thanks!"

Sam knew what the rhino wanted, and Sam knew he wanted to follow his uncle immediately. But that might seem a bit odd...so the horny teen decided he'd just have to force himself to wait.

Sam couldn't help but stare when Michael turned to walk away. If his uncle's absurd musculature wasn't already appealing enough, the kid could see his uncle's heavy balls and big grey cock as he turned around. Seeing these things didn't really take much effort at this point: the latter organ was blatantly exposed for all the world to admire as it pushed the fabric of Michael's speedo outwards and away from his body. His uncle's taut back and butt were also more than deserving of his attention, and the way they flexed and rippled as the rhino walked was absolutely mouth-watering. Trying not to get too excited, Sam forced himself to turn back to the rest of his family, at least for now.

Uncle Michael sauntered back the hotel, confident that he had had the desired effect on his nephew. The kid would join him soon enough, but it was good that he had decided to stay behind. If he didn't, Michael would've had to find some way to delay him. After all, he did have some preparing to do before his nephew's arrival. Shortly after posting an ad online, Michael had received an email from a cute, subby little dalmatian named Josh. The two exchanged a few pictures of varying degrees of obscenity, and the lithe, 18-year-old dog seemed suitable for Michael's purposes. Given that, the rhino had asked the Josh to meet him in the hotel lobby at around 4pm. It was 4 now, and Michael boldly strode into the hotel and down the hall before entering the lobby. His new friend had just sent him a text message to let Michael know that he was here.

Sure enough, upon entering the lobby Michael saw that there was what looked to be a young dalmatian about 20 feet away, seated and facing away from him. The kid hadn't noticed him yet, so the rhino thought he might have a bit of fun here and now. Dropping his speedos, Michael began to jack his semi-erect, dripping cock as he made his way across the lobby. Reactions were mixed, with some covering their eyes and hurrying off while others gawked and, by the look of it, got a bit excited themselves. It didn't take long to make his way over to the kid, but Michael still managed to get himself fully hard by the time he reached the couch on the other side of the lobby. Once there, Michael could see that the dog hadn't noticed some of the more audible reaction's to his public masturbation because Josh had headphones in. Grinning at this new opportunity, Michael gripped the base of his 15-incher and bounced it against the top of Josh's head, a dollop of thick precum soaking the boy's snout and splattering across the dalmatian's shirt and shorts. With a loud yelp, Josh jumped up and yanked his headphones out. Turning around, he was confronted with the source of the precum still covering his snout.

"Oh..."

"Josh, right? How's it going?" Michael asked as he flexed his right arm and slowly stroked his hard dick with the left, pre drooling onto the back of the hotel lobby's couch.

"Good, I think." Josh said, lapping at the pre on his face and reaching out to touch Michael's solid, rectangular pecs.

"Well, I'm glad to hear it."

Michael placed one hand on the back of the dalmatian's head and leaned in, licking the kid's face before kissing him. The boy's mouth filled with his thick tongue, Michael let the dog worship his muscular chest and arms. For a few minutes Michael flexed whatever muscles Josh was focused on, but soon decided that they had probably overstayed their welcome.

"Let's head upstairs," Michael suggested, picking the rather light puppy up and carrying him towards the elevators.

Giving his uncle a 10 minute head start, Sam made up some excuse about feeling a bit tired and wanting to take a nap before dinner. Trotting back to his towel, the kid threw on a tight tank top and forced himself to walk rather than run back to the hotel. Frankly, it was pretty difficult to conceal his eagerness. Entering the hotel itself, he observed that there seemed to be a bit of a commotion, with groups of furs chatting in either hushed or exaggerated tones. Many more were making their way to the lobby, as if to observe the aftermath of some terrible crime. Still, it was probably nothing interesting, and Sam was much too eager to get back to his room to tolerate any detours. Finding himself alone and almost unbearably horny in the elevator, Sam began to rub his already growing dick through his trunks. The rhino's formidable 10-inch cock filled rapidly, stretching the fabric and creating a very visible bulge. A minute later, Sam stepped out of the elevator and onto his floor. As he walked down the hall, Sam's penis itself wasn't visible, the trunks were too large and encompassing for that, but the sheer size of his dick meant that fellow guests probably found it difficult to avoid noticing the rhino's arousal as they walked past. Arriving outside the door of his room, Sam thought he could hear some faint sounds coming from within.

'Moaning? ...and slurping?' Sam thought to himself, reaching down and pulling his now rock hard cock out of his trunks. Moaning might make sense, if Uncle Michael had decided to keep himself entertained while he waited...but slurping?

This was a mystery that Sam needed to solve. Opening the door as he wiggled out of his trunks, Sam was greeted by the sight of a dalmatian kneeling in front of the hotel room chair and between his uncle's tremendous thighs. From what Sam could tell, the dog was sucking on his uncle's heavy balls while fervently stroking the slick pillar of grey flesh before him. The size difference between the two was incredibly arousing, and it served to remind Sam of just how huge his uncle's cock was.

"Hey, Sam." Uncle Michael said, grinning as he placed his hands behind his head and leaned back against the chair. If Sam had had any reservations about joining his uncle, they evaporated the instant the older rhino exposed his wonderfully hairy pits.

"Hi, Uncle Michael."

"Woah, wait. He's your nephew?" Josh asked, getting up from Michael's balls while still stroking his cock.

"No need to speak, puppy." Michael responded, grabbing the back of Josh's head and shoving his cock into the dalmatian's mouth. "Just suck."

Sam watched as the dalmatian began to suck his uncle's fat dick. It was impressive watching the small dog fit a good 7-8 inches of the thick meat into his maw as he blew the big rhino, Michael's grey shaft becoming increasingly slick with spit and whatever pre Josh failed to swallow. Satisfied that the pup's focus was back where it belonged, Michael returned to his previous position and called Sam over.

"These pits aren't going to clean themselves, nephew."

Sam blushed as he closed the distance between himself and his uncle; as familiar as he had become with licking his uncle's armpits, having an audience was new. Sam straddled his uncle and sat himself down on Michael's abs. Leaning in to kiss the older rhino, Sam moaned as the two invaded each other's mouths. Uncle and nephew exchanged saliva for several minutes, and all the while young Josh tried to concentrate on gulping down as much of Michael's precum as possible. The copious amount of the creamy liquid would have made the task difficult in its own right, but its difficulty was compounded by his profound desire to watch the incestuous happenings above him. Finally, Michael took hold of Sam's horn with his left hand and shoved the kid's snout into the sweaty orange forest of his right armpit.

"Lick."

Sam mewled as his senses were assaulted by his uncle's musk; the teenage rhino's cock, compressed as it was between them, started to leak all over Michael's furry abs. Sam inhaled as much of his uncle as he could before giving the pit the first of many eager, almost frantic licks. Massaging his muscle god uncle's firm pecs, broad shoulders, and bulging arms, Sam soaked his uncle's armpit in saliva as he lapped up every bit of sweat he could find.

"One more." Michael grunted, pulling Sam out of one pit and forcing him into the next. "Heh, you like how much of a pig my nephew is, Josh?"

"Hell yeah..." Josh said, his mouth free of Michael's cock for the first time in five minutes. "This is so fucking hot."

Michael chuckled at the young dalmatian's enthusiasm, though Michael noted that his interest in Sam's activities clearly wasn't strong enough to stop the kid from stroking the rhino's meat. And for all Michael's enjoyment of Sam's pit and muscle worship, it certainly wasn't enough to prevent him from moaning and bucking his hips as Josh licked his piss slit.

"Ughh...alright, Sam. I think it's time you used that tongue for something else."

"Okay, Uncle Michael." Sam gave his uncle's matted armpit one last lick. "What should I use it for?"

"Turn around," Michael ordered. "Josh is doing well down there, but I think he could use some help." Sam smiled.

Aided/manhandled by his uncle, the smaller rhino managed to get himself situated in the opposite direction. For about a minute, Sam just jerked the last 7 inches of his uncle's penis and encouraged the dalmatian to go further and further down the wet length. Josh responded well to the encouragement, especially after Sam placed a hand on the back of the dog's head and began forcing him down his uncle's cock. Michael, like a good uncle, tried to help his nephew by thrusting up into the puppy's mouth. While Michael enjoyed the gagging and slobbering noises this produced, he really wanted to bury his dick in someone's throat. And no matter how hard Josh and Sam tried, the poor dog just couldn't take the last 5 inches.

"Ugghh...fuck. Why don't you show him how it's done, Sam," Michael said, punctuating his recommendation by giving his nephew's hairy asshole several longue, slow licks.

"Oh yesss, Uncle Michael..."

Sam took hold of the fur on the back of Josh's head and pulled the dog off of his uncle's schlong, a good 10 inches of it sliding out of the puppy's throat and mouth. Drool ran down the dalmatian's chin as he coughed and gasped for air, though his attention promptly returned to the two related rhinos in front of him as Sam took the head of his uncle's cock into his mouth. At first Sam sucked the tip, and then just the first 8 inches, bobbing up and down while massaging whatever he left out of his mouth.

'Okay,' Josh thought. 'This is hot, but it isn't any more impressive than what I was doing...Maybe Michael just likes this more because it's his nephew?'

Sam pulled up until only the tip was still in his mouth. After nibbling lightly on his uncle's foreskin, he made eye contact with Josh and began to travel back down Michael's cock. This time, however, he didn't stop at 8 inches. Sam kept going, smoothly taking more and more of the vascular pipe into his throat. Josh's eyes grew wide as he watched Sam swallow his uncle's penis, the dalmatian's jaw dropping slightly when the tip of Sam's snout disappeared into his uncle's thick orange pubes.

"Holy shit..." Josh muttered.

"Fuck yeahh!" Michael shouted, relishing the feeling of a wet sleeve wrapped tightly around his dick.

A dumbfounded Josh watched as Michael placed both of his hands on his nephew's head and began to slowly fuck the kid's face. The two teenagers managed to maintain eye contact, despite Sam's compromising position and the inches of cock constantly entering and exiting his throat. Or, rather, they maintained eye contact until Michael once again buried his tongue in his nephew's asshole. Sam's eye's rolled back as he tried to moan around his uncle's shaft. What actually came out was more of a gurgle, saliva and pre pouring from his lips and soaking his uncle's balls. Josh's dick throbbed, drooling precum onto the carpet...he couldn't resist joining in in whatever way he could. First, the little dalmatian returned to worshipping Michael's heavy balls, licking and sucking on the massive orbs and inhaling as much of Michael's musk as possible. After coating every part of Michael's sack in his own saliva, Josh stood up and walked towards the back of the chair. The dalmatian took a moment to watch the Michael repeatedly bury his tongue in Sam's hole, spreading the tight ring as he continued to steadily thrust his meat into the boy's gullet. Wrapping one hand very gingerly around the older rhino's horn, Josh pulled back slightly.

"I want to taste his ass on your tongue, Michael."

"Yeah?" Michael asked, withdrawing his tongue with a loud slurp. "It's all yours, kid."

Josh leaned in and kissed the muscular rhino. For a moment or two their kissing was almost chaste, the sounds made by their lips drowned out by the far raunchier noises coming from down below, but Michael was impatient. Releasing his grip on his nephew, Michael wrapped one hand around the back of Josh's head and held him in place as he forced his tongue between the puppy's lips, invading his mouth. He rumbled loudly as he explored Josh's maw. At the same time he used his free hand to scoop up some of Sam's pre from his chest and the crevices between his abs. Once he was sure his fingers were slick enough, Michael played with his nephew's hole before inserting his index finger deep into Sam's rectum. Before long he had added a second finger and begun teasing his nephew's prostate. As far as Michael could tell, the kid seemed to enjoy his uncle's attention, at least based on the sudden increase in the amount of precum pouring over his pecs and abs. Michael spent the next few minutes alternating between fingering and rimming his nephew's butt, sharing the taste of the teenager's well-stretched hole with Josh whenever possible.

His jaw and throat were absolutely aching, and Sam couldn't take it anymore. Placing one hand on the soaked chair beneath him and the other around the base of his uncle's engorged cock, Sam slowly pulled the thick meat out of his esophagus.

"Please just fuck me, Uncle Michael!" Sam croaked.

"Heh. Do you think I should give my nephew what he wants, Josh?"

"Definitely..."

Michael took hold of his nephew's waist and stood up. He lifted the kid into the air and gently lowered him towards the floor, allowing him to get to his feet.

"Now that my nephew is up, Josh, why don't you go and stand right by the bed next to the window?"

"Whatever you want."

"Good." Michael said, sauntering a bit as he followed the twinky dalmatian.

Reaching the base of the bed, Josh turned around to find Michael standing almost directly behind him. The rhino had to be almost 2 feet taller than him, Josh realized, and probably several hundred pounds heavier, too. Only 16 inches separated him from this mountain of grey muscle, a distance which closed to 15 inches when Michael pressed the tip of his cock into Josh's upper belly.

"Turn back around, Josh."

"...Okay," Josh said, looking down at Michael's pulsing shaft.

"Don't worry, puppy. I'm not going to fuck you just yet. Sam's dick is going inside of you first."

Josh glanced in Sam's direction. The 16-year-old rhino jock was just standing there, grinning as he stroked his own 10-inch meat.

"Oh..."

Michael smirked as he helped to turn Josh around. Taking hold of the scruff of the dog's neck and the base of his tail, Michael forced the dalmatian down and onto the bed. The sheets and mattress were crusty with four days-worth of dried cum, sweat, slobber, and piss (housekeeping had given up after the first couple of days). The stench of it all was enough to make Josh's mind reel. Sam grabbed a bottle of lube from the bureau and coated his dick with the stuff, mixing it with his pre as he made his way over to the bed. Pressing his cockhead against Josh's hole, Sam kissed his uncle as his penis sank into the older teenager's ass. Josh's whining grew louder with every inch of cock pushed into him, but Sam could tell his puppy didn't want him to stop. He could smell how aroused Josh was. The young rhino's hips pressed up against the dalmatian's backside a few moments later, and Sam knew that he was balls deep in the dog. It made him feel more dominant than he had ever felt before; he growled into his uncle's mouth as his cock jerked inside Josh's butt, giving the dog's insides in a fresh coating of precum.

Sam broke the kiss, pausing briefly to let his uncle drool into his open mouth, before looking down as he began to pull out. Pushing Josh's firm little cheeks apart with both hands, Sam observed with some enjoyment that his schlong was slick and shiny as he drew it out of Josh's butt. He almost felt bad for the puppy's pink little sphincter, stretched wide around his thick dick.

"How's that ass feel, Sam?"

"Fucking awesome," the young rhino said as he slowly pushed back in. "It's so fucking tight."

"Yeah, I'll bet it is." Michael said, another line of drool falling from his mouth and landing in his orange chest hair. Michael spanked his nephew's firm ass. "Get to it, kid. I want to watch you rail this puppy."

Sam needed no further encouragement. Pulling out until only the tip of his dick remained in Josh's ass, Sam pulled both of Josh's arms back before slamming his cock back inside with a loud schlorp!

"Aaaaahh! FUCK, DUDE!"

"Yeahhh," Sam moaned, the young rhino's head tilting back as he began to thrust long, hard, and deep into his whimpering puppy's butt.

"Awesome," Michael whispered to himself, stroking his cock as he watched the two teenagers fuck.

Michael decided to give the boys about five minutes to themselves. During that time Sam managed to reduce his dog to a quivering mess, the puppy's mouth agape and eyes rolled back as his ass was plowed harder and faster than ever before. It was incredible, Michael thought, watching his beautifully fit nephew hunch over the dog, grunting obscenities and drooling as he fucked the dalmatian's hole. But it was time for something new, Michael thought, surreptitiously pouring fresh lube onto his own penis.

"Slow down, Sam. And turn him over without pulling out. I want our puppy on his back." Sam obeyed his muscle god without hesitation. Taking his place behind his nephew, Michael lifted his heavy dick and allowed it to fall against Sam's back with a muffled, wet slap. Precum and lube splattered across Sam's tank top, staining his shirt as the mixture ran in rivulets down towards his ass.

"Pay attention, Josh," the big rhino growled, bringing the dalmatian back to reality. "I think both you and Sam are going to enjoy what's about to happen."

Michael held Sam in place, in this case balls-deep in Josh's ass, and dragged his leaking member down his nephew's back, further soaking the boy's shirt. Using his left hand to place the head of his dick against the boy's well-prepped hole, Michael used the right to pull his nephew's head back as he filled Sam's butt with cock. The massively muscled rhino wasted no time, not stopping until his hips made contact with his nephew's quivering ass and his heavy balls were pressed against Sam's thighs.

Josh heard neither Michael's dominant rumbling nor Sam's high-pitched mewling. The dog was too focused on the sight of Sam's shirt stretching as his gut distended, a distinct outline forming around Michael's fat cock as it moved deeper and deeper into the 16-year-old's intestines. The bulge in the younger rhino's belly, combined with the throbbing dick in his own ass, was almost enough too much for Josh. But against all odds, the puppy managed to hang on.

Michael held his nephew in that position for a few minutes, his thrusts slow, long, and deep. The almost absurdly hung rhino couldn't help but smirk as he listened to his nephew whimper through closed lips, the boy's maw clamped shut in Michael's grip. The sense of total dominance and control it added to the experience really complemented the feeling of forcing his cock deep into his nephew's bowels, Michael thought. Of course, Sam had gotten better at adapting to his uncle's size over the past week, and once his nephew's whimpers had begun to quiet down a short while later, Michael released the kid's maw. Grabbing the back of his neck instead, Michael forced Sam forward and on top of the subby little dog below him. Now leaning over both of the much smaller teenagers, Michael pulled out until only about a quarter of his dick remained inside Sam's ass. Making eye contact with Josh, Michael grinned before slamming his entire cock back into his nephew's butt in one hard thrust.

"AAAAHHH! AAAAHHHHH! FUCK, UNCLE MICHAEL!"

"Yeahhh. You like that big fucking cock in your ass, boy?"

"Ohhhh, fuuuuck," Sam gasped.

It was all Sam could muster; the wind had been knocked out of him. His body shook with every hard thrust, and it was a struggle just to remain conscious.

Josh, for his part, was wide awake...not that he could open his eyes, given that Michael was drooling all over his face. But he could still feel. He could feel Michael's cock through Sam's gut, and he could feel Sam's cock throbbing inside of his own ass, soaking his insides in precum. And it was no surprise to Josh that Sam's cock was leaking so copiously; after all, the rhino's poor little prostate was no doubt under quite a lot of pressure. Of course, what Josh couldn't feel was that Sam's prostate wasn't just under pressure. It was being massaged by the veins that covered Michael's penis. The pleasure was almost overwhelming. And after only a few more minutes of hard rutting, Josh heard Sam grunt a quiet, "I'm cumming."

Josh could feel it. Sam's dick was jerking violently, filling the dog with warm cum. The dalmatian wiped some of Michael's saliva from his face and opened his eyes. The bigger rhino's thrusts had slowed dramatically, returning to about their original pace.

"He's cumming inside of me, Michael."

"I know, little puppy. I can feel his tailhole squeezing my cock. Don't worry...just a few more thrusts and I'll pull out."

Michael was true to his word. He hilted himself in his nephew just three more times, Michael letting out a low rumble on the third thrust. "Mmm. Damn, that felt good."

A sick squelching noise followed as Michael pulled his fifteen-inch pillar of flesh out of his nephew's gaping hole. Stepping back a few paces, Michael scratched his ripped, hairy abs and admired the image before him.

"Now isn't that lovely," Michael said, watching his nephew's heavy balls pulse as they continued to empty themselves into the dalmatian. Excess semen was already leaking out of Josh's ass and seeping into the ruined mattress beneath them.

"Once you're done cumming, Sam, I want you to pull out and sit on the edge of the bed. Josh and I have a little surprise for you."

"Okay, Uncle Michael," Sam groaned, absentmindedly humping the dog beneath him.

Josh, on the other hand, said nothing. Though his ears and tail did twitch a few times. Apparently the time had come.

Josh decided the spend the next couple of minutes being a slightly more active partner than had been entirely possible during Michael's little show of dominance. Josh took Sam's head into his hands and kissed the muscular young rhinoceros. Exploring the kid's fit body, he accepted Sam's larger tongue into his mouth and squeezed his hole around the boy's penis. While the fleshy length had started to soften as the flow of ejaculate ebbed, Josh's actions breathed new life into the organ.

Michael couldn't help but smile as he watched his nephew's thrusts growing harder and faster as the kid sucked face with their new dalmatian friend. But this wasn't part of the plan, and he would have to put a stop to it. The mountainous rhino's own hard cock bounced as he approached the bed once again, this time lifting his nephew up, off, and out of Josh. Sitting him down on the edge of the bed, Michael turned to Josh, flipping the dog over and onto his stomach before lifting him off of the bed as well. He set the dalmatian down in front of his nephew, pushing him down to his knees, and said one thing: "suck."

Sam's eyes widened as the dalmatian kneeling between his thighs practically worshipped his cock. Taking the rhino's balls in his paw, the puppy ran his tongue up and down the entirety of Sam's length several times before sucking on his foreskin. Josh had barely taken the younger teen's cockhead into his mouth before he felt Sam's hand on the back of his head, pushing him down. The pressure was unrelenting, and a moment later Josh was forced to accept the rhino's cock into his throat.

"Fuck yeah...you're gonna' take it all, Josh," Sam moaned, another couple of inches of his dick disappearing between the dog's lips.

Josh heard a loud moan above him as he swallowed the rhino's shaft down to the base, his snout buried in Sam's messy orange pubes.

"Try fucking his face, Sam." Michael said, kneeling beside his nephew.

There was no verbal response. Sam started slow, pulling only few inches out a time before pushing them back down the dalmatian's throat, but his pace soon quickened. Ten slow, wet thrusts later, Sam pulled all but the last inch or two from Josh's throat before slamming the dog's face down and into his crotch. Josh retched and pulled himself off.

"God damn, Sam. That's a lot of fucking dick..." Josh said, staring at the grey phallus' head as he stroked the throbbing 10-inch cock from tip to base. Squeezing the base, Josh's eyes widened as Sam's urethra opened. The kid's dick throbbed hard and a viscous spurt of precum splattered across the dog's face, matting his fur.

"Yeah, it is," Michael said, grinning and playing with his own hard dick as he watched. "Why don't you try licking the inside of that big meat? I know from very personal experience that my nephew's a fan."

"Yeah? All right...I'll give it a go," Josh replied. The dog knew full well what was probably coming next, and he couldn't wait.

Josh inserted his tongue into Sam's penis as he continued to stroke the boy's shaft.

Sam leaned back, closing his eyes and letting out a loud, unsuspecting moan.

"AHH! What the fuck!?" Sam shouted. The rhino's eyes shot open as he felt something much bigger than Josh's tongue enter his cock. Looking down, he saw that his uncle had taken hold of Josh's head and pushed the dalmatian's snout into his dick! And for that matter, his dick was fucking growing! And it felt better than anything Sam had ever felt before.

"Holy FUCKING shit, Uncle Michael! What the hell are you doing!?" Sam gasped, collapsing helplessly on the bed as Michael shoved the rest of Josh's head into his nephew's rapidly swelling cock.

"Just feeding your dick. Though, at this point, it's more a question of what you're doing, Sam."

Sam forced himself onto his elbows and looked down, watching with a mixture of fear and incredible pleasure as his now gigantic schlong sucked Josh in to his narrow shoulders. A moment later, those too were inside the young rhino's gaping urethra.

"Ohhh fucking shiiittt...What is happening..." Sam groaned, the dalmatian's chest and upper arms disappearing into the 16-year-old's penis.

"Nothing you don't want, Sam. Trust me on this." Michael said, standing up and moving behind the dog's now bent over backside. "See, nephew, even Josh is enjoying himself," Michael added, pointing to the dalmatian's wagging tail before giving the 18-year-old's hard cock a few strokes.

Taking hold of the dalmatian's hip with one hand, Michael gave his own thick shaft a few more strokes before placing the tip of his dick beneath the puppy's tail. Pushing forward, Michael growled as his cock sank into the little dog's ass. Using his nephew's leftover cum as lube, Michael quickly hilted himself in the now violently shaking dog.

"Fuck yeah," Michael grunted, smiling when he heard the muffled moans and whines emanating from within his nephew's obscenely engorged cock. "Nice and tight."

"Jesus, Uncle Michael. Now you fuck him?"

"Sure." Michael said, pulling out about halfway. "Why not?" Michael asked as he pushed himself back in.

"Besides, I don't want your first time swallowing someone with your cock to go by too quickly," Michael added, thrusting harder into the dog's hole while his nephew's old load dripped onto the carpet. "Just sit back, jerk your dick, and enjoy the show."

And that's exactly what Sam did. Grasping his penis with both hands, neither anywhere close to touching the other, Sam masturbated as he watched the debauched scene in front of him. Michael knew that this was the first time Sam had gotten to more or less sit back and watch his uncle fuck someone else, so he decided to make things a bit theatrical. Michael rolled and gyrated his hips as he humped Josh's ass, causing his abs to pop and striations to appear across his hairy, sweat-soaked pecs. He would run one hand slowly across his torso, as if exploring his own body, before lifting an arm and flexing hard, biceps, triceps, forearms, and shoulders all visibly rippling. Of course, whenever he did so, he made sure to keep a tight grasp on his doggy bottom's hip with the other hand, lest his nephew's cock suck the dalmatian off of his dick before Michael was ready.

Uncle Michael's thrusts were growing progressively harder as the minutes slipped by, and Sam could only gasp in response. His uncle's hard fucking was almost thrusting Josh into his cock, which, combined with the dalmatian's own wiggling and shaking, caused waves of pleasure to flow from Sam's dick. It addled Sam's mind, to the point that he almost missed his uncle's next comment:

"Oh, fuck! I'm gonna' cum!" Michael shouted.

Michael's roar reverberated down the hall as his heavy balls contracted, pumping their contents into his helpless puppy's teenage ass. The rhino continued to rut the dog as he came, jets of both his and Sam's spooge squirting out with every thrust, soaking Michael's balls, thighs, and calves. Only a few moments later, Sam heard Josh's muffled groan inside his dick, and Michael felt the boy's ass squeeze rhythmically around his meat. The kid was cumming too, his untouched penis jerking wildly as it painted the bed and carpet.

After a good two minutes of orgasm, Michael's balls were empty and Josh's gut was full. Pulling out with a loud, "Yeahhh..." Michael asked if the dalmatian was enjoying himself. Satisfied with whatever it was Josh had tried to say from inside Sam's cock, Michael fell to his knees and buried his snout in the puppy's leaking tailhole. Weakening his grip on Josh's hips, Sam sighed as his dick began to swallow the older teenager once more. However, Sam's unconscious efforts encountered a slight hindrance in Josh's swollen belly, filled as it was with well over a gallon of rhino cum. Still, Sam's cock pressed onwards, squeezing Josh's gut as it slowly but surely engulfed the dalmatian's lower torso. The dog groaned as his intestines, so recently filled, were forcibly emptied into Michael's waiting gullet.

Michael ate out Josh's tailhole for as long as possible, swallowing much of his own load in the process, before the dog's cute little butt disappeared into Sam's hungry schlong. Licking his lips and letting forth a hearty belch, Michael shuffled backwards until he was kneeling behind Josh's twitching feet. Wrapping one massive hand around the dog's ankles, binding his legs together, Michael placed his other hand on the underside of the dalmatian's feet and began to shove the dog into his nephew's cock.

"This feels so good," Sam said, the young rhino's eyes rolling back as his penis rapidly sucked down Josh's legs and feet, depositing the dalmatian in the rhino's hugely inflated sac. Sam fell backwards, breathing heavily as he lay on the soiled bed.

"Wow. That was...interesting, Uncle Michael

"I'm sure it was, kid. Nothing quite like it," Michael answered, poking Sam's audibly gurgling scrotum. The dog inside was already being liquefied, Sam's balls churning him into rhino cum.

"Also...my balls feel weird. Tingly, I think? But a really, really good kind of tingly," Sam said, sitting up and smiling at his gorgeous uncle.

"That's normal, Sam. Trust me, I've had more than a couple of furs inside these big balls of mine."

"Really? So what happens next?"

"Well...I think you're about to find out," Michael said, watching as Sam's sac drew up against his body and pulsed hard, injecting a shot of liquid mass directly into the young rhino's body.

"UGGGHHH!"

Sam's grunt turned into a roar as he fell onto his back once more, shaking hard as his balls throbbed. First the teen's cock and muscled ass swelled, the former gaining about three inches in permanent length and growing thicker than any phallus Michael had ever seen before. Traveling in both directions, the waves of growth struck Sam's abs and legs next. A direct view of the sixteen-year-old's core was obstructed by his tank top, but beneath that thin layer of fabric Sam's abs were rising, veritable valleys forming between them. Michael massaged and licked his nephew's thighs as they exploded with new muscle, sweat flowing in streams between his quads and down across his increasingly muscled, increasingly hairy calves. Sam cried out as a harsh cracking noise briefly filled the room; the young rhino's shoulders were broadening, stretching his chest and upper back in relation to his waist. Michael looked up from his nephew's new tree trunk thighs in time to see his boy's pecs and shoulders expand, filling with firm, rippling mass until the kid's sweat and cum soaked tank top was finally torn apart. Sam's arms were the next extremities to fill with muscle, a single thick vein appearing across each bicep and a roadmap of veins crisscrossing his forearms as new chords of muscle appeared. Finally, even as Sam's muscles continued to develop, hair spread across the young rhino's body, growing denser all the while. Musky orange forests grew in the teenager's pits, and a trail of hair traveled up Sam's abs before spreading out into a triangle of fuzz across the middle of his now heaving rectangular pecs.

The process couldn't have lasted more than a minute, but its effects were dramatic. "...now that was interesting," Sam said, wiping the sweat from his forehead. "What just happened?"

"You grew, and it was definitely a sight to see," Michael responded, getting up from between his nephew's veiny thighs. "And your voice is a hell of a lot deeper, too...but then your neck is a hell of a lot thicker," Michael added.

"Is it?" Sam asked.

Michael just watched as his nephew got up from the bed and began to walk towards the bathroom. The boy was fucking ripped, Michael thought, ripped and massive with a perfect v-shaped back and a beautiful hairy ass. "I'm fucking huge!" the teenage rhino exclaimed, flexing in front of the bathroom mirror.

"That you are. I'm probably going to have to go out and buy you some new clothes before dinner."

"...Yeah, I guess so," Sam said, leaning against the bathroom door, his new body glistening with sweat. "How are we going to explain this to the family?" Sam asked as Michael walked towards him.

"I guess we'll just tell them than you were working out with me all week, and that you were very, very receptive to my methods," Michael said, smiling down at his still shorter nephew as he explored the kid's new treasure trail.

"That's technically true, right?" Sam asked, returning his uncle's smile.

"Definitely. But before I get you some new pants, I'm going to need to get these heavy balls of yours down to whatever their normal size is these days," Michael said, cupping his nephew's sack in one hand and grasping the back of the kid's head with the other. Leaning down, he kissed his nephew. As his tongue entered the teenager's mouth, he felt Sam's cock lurch against his abs, yet more precum splattering across his abs.

Three loud knocks on their hotel room door interrupted the kiss.

"Hotel staff. We've received some noise complaints."

"Sam, I think you should answer."

"Like this?" Sam whispered, gesturing downwards to emphasize his very compromising nudity.

"Absolutely. And, if you like what you see on the other side of that door, then we've found another way for you to drain those big balls of yours."

Sam raised an eyebrow before grinning, his dick twitching and drooling onto the carpet.

"Coming!" Sam called, stepping over to the door. Opening it quickly, Sam exposed himself to their visitor.

"Uhhh..." The gecko, who looked to be in his mid-twenties, was at a loss for words.

"Yes?" Sam asked, "You said you've received noise complaints?"

Staring at the rhino's dripping cock, all the lizard could muster before turning to walk away was a paltry, "...I'll come back later..."

"No," Sam said, grabbing the hotel employee's wrist, "you'll stay."

Sam practically tackled the lizard to the floor. He resisted at first, but it was nothing a rhino as strong as Sam couldn't handle. The struggle ended just a few moments later anyway, after Sam forced the gecko's face into one of his sweaty armpits. His lungs filled with musk, it wasn't long before Sam felt the lizard give his underarm a tentative lick.

"Yeah, clean those pits, bitch." Hearing this, whatever hesitation the gecko had had before vanished. He bathed the young rhino's armpits in saliva, matting down the teenager's orange hair with spit as he explored the rhino's heavily muscled back. Once satisfied with the gecko's services, Sam flipped the lizard onto his stomach, lifted his tail, and tore open the back of his hotel-issued shorts. Burying his tongue in his gecko's ass, Sam rimmed the poor guy as he slathered his ridiculously thick cock in precum.

To the gecko's horror and intense arousal, Michael stepped out into the hallway and into the lizard's line of sight a minute later.

"I'm going to need his mouth, Sam."

"Of course, Uncle Michael," Sam said, giving his lizard's tailhole one last lick.

Lifting the gecko onto his hands and knees, the lizard cried out as Sam pushed the head of his dick into his ass. A moment later, Michael dropped to his knees and shoved his cock into the gecko's open maw.

"Want to push in at the same time?" Sam asked, the gecko below them giving a muffled protest.

"Hell yeah."

"Alright. Let's count it down together," Sam said.

"One."

"Two."

"Three," the two groaned, Michael forcing his entire fifteen-inch length down the hotel employee's very flexible reptilian throat as Sam pushed all thirteen inches of his girthy dick up the gecko's butt. The gecko shook hard, a loud retching, gurgling noise leaving his lips as the two rhino's filled him.

Loud grunts and profanity had combined with wet slapping noises to fill the hallway with lewd music. After a good seven minutes of hard rutting, Michael kissed his nephew as he came, his cock pumping several pints of rich semen directly into the lizard's stomach. Pulling out of the gecko's throat, Michael stood and watched, idly stroking his slick, flaccid penis as Sam pushed the lizard's face down into the hallway carpet. Michael couldn't help but drool a bit at the sight: the teenage rhino's new muscles were dripping with sweat and bulging as he railed the little gecko.

Wrapping one arm around the lizard's torso, Sam realized that he could actually feel his own dick through the gecko's distended belly. This, combined with the intense pleasure of the gecko's ass squeezing his meat as the lizard came, was enough to drive Sam over the edge. Letting out the loudest, deepest roar yet, Sam's balls began to drain their contents into the little gecko's bowels. Over two gallons of hot viscous cum entered the gecko's intestines as Sam's testes shrank, draining themselves of most of what had once been Josh the dalmatian. Collapsing on top of the now unconscious, slightly inflated gecko, Sam let out a heavy sigh.

"Best family reunion ever, Sam?"

"Yes...definitely."