Story by Custos
(Original posting 4th of April 2025 on https://inkbunny.net/Custos)

Please don’t repost this story, let it remain in my galleries!
This story contains material for adults only, do not read if you’re a minor.
The material presented is fictional and for adult fantasy only.
The author does not condone any of the depicted illegal activity in real life.

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MarcusKayne commission: Uncle's Obscene Birthday Gift

It had started out innocently enough, with Kevin and Cody playing not so innocent adult games in the slightly remote and underutilised bathroom shack in the woods near the playground. The first adult man they had played with, a virile specimen of the equine persuasion named Marcus, had made sure to get the details of the boys, and the three had met up often near the hole in the woods.

Nearly a year had gone and passed by, and to Kevin’s great pride, a tuft of fuzzy brown hair started to grow on his head around his tenth birthday. Soft and wispy like baby hair, but the start of a mane nonetheless! Their dad, Theo, hadn’t hidden the fact of how proud he was about his boy starting to turn into a man as well. Something that had translated in Kevin being allowed to stay up later, and join his dad for more adult male oriented activities like survival camping and fishing trips. Just men among men.

It is during one of these fishing trips that Kevin had rekindled his relationship with his absent uncle, his dad’s older brother John. John is a ruggedly handsome lion male in his late thirties, with a darker complexion in his fur than his brother’s family’s sand-coloured bodies and brown manes. Old by any cub’s standard, but John’s playfulness and youthful brazenness made Kevin regard his uncle more like an older brother than a real adult. And once John met Cody, who now was nearly six years old as well, the little cub very much felt the same.

John, with his brown fur colour and nearly black mane, is sort of a trickster and always up for mischief. Much to the boys’ mother’s annoyance, but seeing as she supports her husband rekindling the bond with his absent brother, she bites through most of it. Theo’s just happy to have his brother back in his life, and give his sons the chance to connect with their uncle.

And Kevin had been delighted to find out his uncle wasn’t averse to some really intimate family contact as well. His dad is a lightweight when it comes to alcohol, and there had always been booze aplenty when John joins the father and son for a camping trip.

Last time, Theo had passed out pretty early into the night while drinking and chatting with his brother at the campfire, much to John’s mischievous delight. He’d sworn Kevin to secrecy, and subsequently pulled down his unconscious brother’s shorts to reveal Theo’s big fat fatherly sausage to his son. Kevin had gasped and grown erect in his own shorts immediately, and had watched on in horny terror while his uncle had sucked his dad off.

That night, John had explained to the ten-year-old cub that he’d seen the way Kevin and Cody interact with each other, and he had snuck a peek into the older boy’s account on the family computer. He found the folder with pictures of Kevin and Cody’s sexual escapades, with each other and at the glory hole. Even before finding the highly illegal material, John had a hunch the two brothers were even closer than he and Theo had been at their age. He had just wanted to find proof of that, and he found so much more.

Kevin had drawn his young cub cock from his shorts at his uncle’s encouragement while John told him the stories of himself and the boy’s dad playing naughty games when they were at that age. All the while with John playing with his unconscious brother’s large cock in front of his nephew. Theo easily had the bigger cock between himself and his brother, and the way Kevin had been developing had been very promising for the boy’s size once he’d grow into adulthood.

Needless to say, the naughty uncle and nephew had shared a steamy night of lust and passion together while camping in the middle of nowhere near the lake. Kevin had sucked his daddy for the first time while his uncle held the unconscious male’s cock up for his nephew, and both had ridden Theo’s dick and fucked the virile knocked out lion male’s tight virginal ass hole together. In a scandalous taboo incestuous threesome, as uncle and nephew, taking advantage of their torpid brother and father.

And, of course, John and Kevin had fucked and sucked each other too into the wee hours of the morning. A ruggedly handsome but slightly sleazy late-thirties-something with his adorable virginal ten-year-old nephew.

The conversation in the afternoon hadn’t been nearly as awkward as expected, with Theo waking up to find his aching hole leaking with his brother and son’s sperm. The lion male had taken it suspiciously well, and Kevin had been stupefied to find that his dad treated being molest in his drunken slumber more like a prank from his brother than the rape it actually had been. And then the cat was basically let out of the bag that John and Theo’s relationship as brothers had been marked by casual incest and sex their whole lives as cubs by their own dad.

While it had been partially the cause for the rift between them a few years ago, they both wanted nothing more than to rekindle their brotherly bond and return to the fun casual relationship they used to have. And with John confiding into Theo about what he had found out about the latter’s sons, they both had come up with a plan to encourage Kevin to explore their familial bonds even further together. And if Cody was willing and would promise to keep their manly activities a secret, he’d be allowed to join them on the next camping trip. As long as mom wouldn’t find out. She wouldn’t understand as a woman or mother, for this kind of connection can only be shared between men of the same blood.

Kevin hadn’t been allowed to say anything about what the plans were for the upcoming trip, but when presented with the option to tag along if he could be a big boy, Cody had overwhelmingly and enthusiastically said ‘yes’!

Their mom had objected to throwing her nearly-six-year-old baby boy into a hardcore survival fishing and camping trip, citing he was much too young for that, so their dad Theo had compromised with his wife. They’d visit a camping ground near a beautiful remote lake instead, with sanitary facilities and a little shop, retaining the comforts of modern life for their youngest cub. Mom relented and agreed.

And so, for Cody’s sixth birthday, the little lion cub and his brother are taken on an all-male bonding trip by their dad and uncle. Uncle John has made the arrangements, and while he insists no foul play, Theo’s suspicious of that all too familiar mischievous glint in his brother’s eyes.

After a few day’s travel, the car rolls up to the gates of a vast fenced camping ground around a lake nestled in a mountainous valley. The landscape is gorgeous and bathed in the light of the sunny summer’s day, and the presence of plenty of normal families both visibly puts Theo at ease and causes mild disappointment. Somewhere deep inside, he’d probably hoped his brother would have deep dark connections to a place where they can fuck cubs out in the open. Still, John is still smiling suspiciously.

The group is given the talk about the rules and the facilities at the camp ground, and is then directed to their spot. There are clothing optional areas, but the rules dictate that everyone has to have clothing on their person to cover up if needed.

Their spot is situated at the water, not too far from the facilities, but also not too close so it’s nice and calm. Kevin and Cody really want to go for a swim in the lake, and their father is about to disappoint them since they need to get set up, but John quickly interjects.

“Come on, little bro! The boys have been cooped up in that hot car for days. How about I set up the tent, and you take them for a swim?”

Again, Theo squints his eyes a little suspiciously but rolls his eyes as he relents to his sons’ expectant expressions.

- “Fine. Guess I shouldn’t pass up an opportunity to offload all the work onto you, John.”

John drags his sand-coloured lion sibling into a brotherly hug, accentuating the contrast with his much darker fur colour and mane. Theo nearly yelps when he feels his older brother’s hand squeeze his ass, out of sight for the boys. Groping aside, the little back and forth had been rehearsed beforehand by both adult male lions. When Theo and the boys would return from their swim, John would have the birthday cake ready to surprise little Cody.

“Alright, bro. See you soon. Oh! And don’t forget your swimming supplies!”

John hands Theo the backpack, and with a last suspicious look, Theo ushers his boys towards the beach area.

He had been right to suspect John was up to no good. In the communal changing room, the lion father had blushed deeply when he found not only the regular swim suits, but also three sets of erotic male underwear in various sizes. The briefs are made entirely out of mesh, with a removable opaque fabric pocket in the front that hugs the wearer’s jewels snugly, barely leaving anything to the imagination. And if removed, the underwear lewdly accentuates the wearer’s penis by framing it blatantly and obscenely, drawing all attention to the manhood sticking out from the open hole.

There was a note from John in there, instructing his little brother to not chicken out and have them all wear the underwear on their way back. And only the underwear! John reasoned the underwear to be a natural transition of Cody’s childish innocence into manhood, and the perfect opportunity to introduce the little boy to sex.

Needless to say, Theo hadn’t been able to concentrate on swimming much. And when it came time to head on back, the lion father had delicately slipped on the lewd erotic underwear up his youngest son’s legs, and fitted it snuggly around Cody’s little package. The cub had giggled, especially when realising his new undies had a little ‘door’ for his pee pee, but Theo had stopped the six-year-old from playing with it while citing the words his brother had put in the note.

- “You’re a little cub when these undies are put on, Cody, but when that little door next is opened you’ll be a big boy, able to play big boy games. And when next you see a candle, blow it out, and make a big boy wish!”

Cody had been ecstatic to have been given a mini adventure, and he nearly dragged his older brother and daddy back to their campsite. Barely giving the adult lion time to be embarrassed by the weird looks people thrown their way, along with some shocked expressions at seeing a father and his young sons in such lewd but technically legal underwear.

When they return, the threesome see a lot of windscreens surrounding their tent, the kind you see on the beach. And when they step around them, they’re greeted with a most heart-stopping erotic scene.

The ruggedly handsome older lion male that is their uncle John is standing behind a small camping table, upon which sits a delicious birthday cake with a lit candle shaped like a six. Flanking him from either side, are six attractive men of various species, and they’re all wearing the same erotic mesh underwear with the fabric pockets in the front removed! Uncle John’s humanoid uncut large cock is throbbing and leaking precum down onto the delicious birthday cake, flanked by six erect cocks on either side that range from humanoid to equine to canine. And Kevin and Cody are most surprised to see Marcus standing there, the dark horse that kickstarted their journey into adulthood back with that little glory hole in the woods.

“Surprise, Cody, baby! Hope you like your big boy present, from daddy, me, and Kev! That is, if you are big enough of a boy yet to get such a big boy present?”

Theo is mortified, frozen in place with bewildered eyes as he beholds his brother exposing himself along with six complete strangers to his little boy. In a public camp ground, no less, windscreens be damned!

However, the big squee of happiness and excitement from the six-year-old lion cub immediately dulls the worst of his daddy’s fears, and the boy eagerly bounces over to the little table while dragging his father and big brother along.

- “Uncle John! How did you know I like ween— penises?!”

John steps out from behind the table and crouches down to receive the biggest warmest and most enthusiastic hug he’s ever had from a cub. His big adult dick getting smushed between his stomach and the little boy’s body, feeling nice and warm to Cody’s tummy.

“Because I’m your favourite uncle, of course! The penis fairy told me you had a very special birthday wish, and helped me find these nice big dicks for you to play with. This is what you wished for, no?”

The little cub can’t put two and two together yet and realise that it must have been Kevin who told his uncle how to contact all of these men they know from the glory hole, and that the little boy wanted six big dicks to play with for his big six birthday. In addition to some good old incestuous family cocks, of course.

- “Uhu! Uhu! Can I play with my present, uncle John? Please, please, please?”

The dark furred lion male in his thirties chuckles, as do the men surrounding the two. In a very lewd and obscene way, the enthusiasm of the little boy adds a wholesome touch to the scene. And it makes all of their adult cocks throb and leak in anticipation.

“Sure, kiddo! But first, don’t you have a birthday quest to complete?”

- “Oh, yeah!”

Little Cody runs up to the cake and finds that each little candle is a tiny penis in the general shapes of the men that are his big boy surprise. He eagerly blows them out under loud applause, and the birthday cake is put aside for later before Cody is lifted up onto the table by several of the handsome studs. The boy is grinning like the Cheshire Cat at his daddy and big bro, shyly squirming a little in place as he stands up all exposed to all the males present. Theo is still stupefied as he stands in front of his little boy on the table, the cub now slightly above eye level with his daddy while his little stiffy aggressively pokes out the fabric of the erotic underwear’s removable pocket.

Kevin has exposed himself already, letting his ten-year-old uncut humanoid cub cock out while tugging at the little snout hiding his glans. It is only when his oldest son starts finicking with his daddy’s crotch pocket, that the adult lion regains control of his faculties. It looks like all the tents surrounding theirs belong to the men John had invited for this special birthday party, and they’re in an otherwise remote spot of the camping ground. It’ll be fine.

Theo’s cock pocket is removed by his older son, the cheeky lion cub with the beginning mane grinning happily at his daddy when his father’s very erect and very large manly penis is revealed to the gathering. And to his little boy, to Cody’s exquisite delight.

John is already massaging the little cub’s tiny bulge while the grown men around them cheer encouraging words at the little boy. The little cocklet is dancing excitedly underneath the fabric and his uncle’s gently care.

“Isn’t your daddy’s penis beautiful, sport? Biggest of the men in our family, that’s for sure. Well, maybe on equal foot with grandpa’s.”

The perverted uncle squeezes his nephew’s six-year-old cub penis through the fabric, slowly fingering the buttons that keep the small piece of fabric in place.

“What do you say, kiddo? Ready to take these off and play big boy games with us?”

Cody’s small chest is heaving with deep breathing, a wide smile permanently plastered on his face as he squirms in overwhelming boyish excitement, unable to speak but only to simply nod at his uncle.

Without further ado, the perverted lion unbuttons the tiny piece of fabric hiding his nephew’s six-year-old penis, and slowly peels it away for everyone present to see. Eliciting many ‘oohs’ and ‘aahs’ from the gathered men.

Cody’s little humanoid penis is beautiful, small and silky, and completely and utterly hard as a nail. Two smooth virginal little boy balls are shyly drawn up in their little sack underneath, accentuating the small thin shaft as the tiny hidden glans’s contours are visible through the hood culminating into an adorable little snout.

John, like every other adult man present, is drooling something fierce while beholding his little nephew’s cocklet for the very first time in such a beautifully boyish erect state. Lewd and charmingly cute at the same time. Trembling and bouncing with the slightest of movements. The virile lion’s manly fingers evoking a cute boyish moan as the skilful digits gently peel Cody’s foreskin down to reveal half of the tiny cherry pink helmet. Making his little boyhood blossom for everyone to see.

“Make a wish, Cody, baby.”

The adorable cub shudders, experiencing overwhelming pleasure from being so openly exposed and seen by these handsome lusty men. He subconsciously juts his hips out more, pronouncing the curve of his little shaft while his uncle gently slides his foreskin up and down halfway his tiny glans.

- “Ah. Uhm. I wanna… I want a birthday kiss from everyone!”

John can see there’s more the little boy wants, but is too shy to say in the moment. The darker lion’s fingers keep gently masturbating the little boy so proudly and openly exposed on the camping table, the hands of the men surrounding him starting to join his as fingers and palms start cupping the boy’s butt cheeks, tummy, and chest. Making Cody’s little cocklet shiver in pleasure.

“Mhm. And…?”

- “And, uhm. I wanna feel all your ween— cocks! And balls! And I wanna lick daddy’s butt!”

“You heard him, boys! Let’s give the birthday boy his wish!”

The men grind themselves against the little boy as he stands on the small camping table, rubbing their cocks up against him as if Cody were a cherub statue in a garden. Marcus’s horse cock is easily the biggest present, and slathers manly precum all over the giggling Cody’s tummy, cocklet, and balls. He takes the lead and kisses and suckles the lion cub’s small penis, while other men start frenching the six-year-old.

Hands, cocks, and tongues are everywhere, slithering between the child’s butt cheeks, all over his adorable little balls, his smooth chest and slightly pudgy tummy…

There’s a bull and a deer, each with long slender feral cocks sticking from sheaths. A conscious choice by John, as they would be the only ones aside from Kevin to fit their cocks comfortably inside Cody’s little bum. And stretch the lucky birthday boy in working up to his uncle and daddy. Furthermore, there’s a Rottweiler with a feral canine cock complete with knot, a rabbit with a cut humanoid penis, and a rhino with a feral cock. An all-you-can-play-with buffet for the most special little six-year-old boy in the world!

Theo is guided into a camping chair by his lewd older brother, the father lion having first tenderly made love with his youngest son’s cute little willy and lips, granting the boy’s birthday wish all too eagerly while being jerked off by Kevin.

The little boy’s uncle scoots his brother forward so Theo’s ass hands over the edge of the nylon fabric chair, two of the handsome men grabbing the young father’s legs and keeping them raised up while Cody is ushered in between his daddy’s spread thighs on his knees. The little boy’s hands immediately dart forward to cup his daddy’s heavy balls, weighing and lightly squeezing them reverently while his uncle fingers his brother, using precum from the men present for lube.

“The penis fairy told me you like licking butts, Cody, baby. Like, a lot! You’ve always dreamed of tasting your daddy. Well, here’s your chance, kiddo!”

Cocks are rubbed all over Theo and Cody’s bodies, the manly lion moaning in the sheer lewdness while the little boy coos with cute shudders and giggles. As the six-year-old dives down between his daddy’s spread-open legs, assaulting his fatherly incestuous pucker with his small wriggling tongue, uncle John starts positioning Kevin behind his little brother.

The boy is confused at first, but when his uncle lifts up his little brother’s lion tail and reveals the virginal pink boyish pucker underneath, the ten-year-old’s cock throbs to life. John massages his own shaft deeply and thoroughly, milking dollops of clear manly precum out and smearing it all over his nephews’s boy hole and cocklet. Lubing up the both of them at the same time in the most perverse way an uncle ever could for the blood of his blood.

Meanwhile, Cody is in little boy heaven. His small hands gripping tightly around his daddy’s muscular ass cheeks, the little fingers digging into the flesh while his small penis throbs something fierce between his own childish chubby thighs. The child’s tiny pink tongue worms eagerly inside his father’s anus, eyes nearly rolling up in his skull while Cody’s breath washes up against his daddy’s heavy balls. The adult lion too is nearly delirious in the pleasure of his son rimming him far more expertly than a boy his age should be able to, and sucks the rhino’s unique elephant-like penis while some of the other men rub their cocks all over his torso and Cody’s back.

Cody gasps when his uncle guides his big brother’s penis smoothly inside his small boy butt, digging his face deeper inside his father’s ass to compensate the minor discomfort with an abundance of pleasure. The two brothers have fucked before, albeit somewhat amateurishly when no adult is around like Marcus. The six-year-old’s tight anus eagerly swallows his brother’s shaft, squeezing rhythmically around it as the little boy’s body already knows what it needs to do to draw forth delicious manly milk instinctively.

“That’s good. Such a good brave boy you are, Cody! Kev is first, then some of my mates, eh? Make you nice and ready for your uncle and daddy.”

The six-year-old lion child mewls, shuddering in pleasure as his big brother’s penis gently rocks back and forth inside his tight little tail hole. His tongue is swirling around the rim of his equally shivering father’s hole, plucking kisses on top of the beautifully winking anus of the adult male lion.

While the little boy’s lips remain locked to his daddy’s pucker, suctioned on like a leech, Kevin experiences his first boyish orgasm of the night. The ten-year-old’s body trembles while his little cock spasms erratically inside his little brother’s snug slick backside in a powerful dry orgasm, before the small penis is withdrawn and replaced with the deer’s slender feral cock. The thin tapered pointy end helps a great deal to slide smoothly up inside the lion child, deeper than any cock has ever ventured before inside Cody’s body.

Not too long after, a warm soothing load of deer semen warms up Cody’s insides, making his tummy feel all nice and full.

Next is the bull, slightly thicker but equally slender and pointy in its feral shape. An absolute pleasure for the little boy as he’s slowly stretched beyond Kevin’s thickness.

Then the rabbit enters with his humanoid cock, smaller in size than either lion but much bigger than Kevin’s. Then, the Rottweiler’s feral canine cock, letting the six-year-old birthday boy experience yet another unique shape to stretch and pleasure his little bottom. Minus the knot, little Cody is nowhere near ready for that bulbous size.

Each manly load filling up the cooing child lubes him up for the even bigger dick coming next. But the rhino is where Cody meets his match. The spongy tapered tip manages to pop inside the squealing little boy, but any more would overwhelm the pleasure Cody gains from the fuck. The rhino is gentle, though, and eagerly rubs one out with just his tip inside. Adding the final ingredient before the nearly delirious Cody is flipped around and lain onto his daddy’s stomach, uncle John already grabbing his brother’s cock and smoothly sinking it up inside his nephew’s small ass.

“There you go, Cody. Playing like a brave big boy! Does daddy’s penis feel good inside your full little bum? Nice and warm and firm. Like a daddy’s bond with his son should be!”

John and Theo exchange a look, the former smiling mischievously but knowingly, while the latter is experiencing the immensely overwhelming bliss of that very first intimate physical connection between a father and his young son. His bulbous humanoid cock head, largest of his family, able to snuggly seat inside his six-year-old child’s tummy, engulfed by the warmth and slickness of the semen of multiple strange men.

Speaking of which, the adult men’s cocks are hard again, and able to go much longer now that most of them had their first climax. They gently crouch to Cody’s sides, making the giggling boy coo happily as they rub their warm shafts and balls all over his and his daddy’s body. The little boy is in heaven, sniffing and licking and fondling the big heavy male orbs while his small penis is gently masturbated by his daddy, whom is balls-deep inside his cub.

Cody is gently rocked up and down his daddy’s thick shaft, when suddenly uncle John lays his cock on top of his brother’s, with the tip kissing the incestuous union between father and son. For a brief moment, Theo is worried his brother might want to double penetrate his six-year-old lion cub, but John simply guides his sibling to slip the boy off his cock and onto his own. Gently fucking his nephew for the first time, occasionally switching with his brother in a bout of sensual brotherly sharing.

“His ass is simply divine, little bro. You sure you never fucked Cody before?”

- “He just got fucked by more cocks than I’ve seen in my life, John! I think it’s normal he’s stretchy now.”

“I’m not complaining, little bro! Hehe. Together?”

- “Together. Gently!”

Both lions, lighter and darker, pull out and ever so gently slip just the tips of their bulbous humanoid cock heads inside the squealing little birthday boy. They thrust gently and shallowly, one back while the other pushes forward. Gently seesawing the happily cooing lion child.

“On three, brother. Like we did with dad!”

- “Don’t remind me.”

“Ready? One. Two. THREE!”

Both virile lion men thrust deeper inside than they did before, together, filling up the poor little boy’s small ass with two adult cocks spasming as they both press tightly into each other. Spewing forth their incestuous fatherly semen, warming up Cody’s tummy once more and soothing the ache of his tail hole being stretched so far. His hard little nail twitches against his uncle’s abs, the sleazy male leaning down to passionately french kiss his own brother and nephew. Sharing a most forbidden taboo kiss between blood.

Little Cody’s legs have to be supported by the helpful men surrounding them, as both he and his father collapse into the camping chair while uncle John falls backward, drawing his cock out and making a jet of his uncle sperm splatter all over his brother and nephew.

“Phew! That may be the most intense orgasm I’ve had in, like, a year!”

- “You ass!”

“Kidding! Kidding. Cody, baby. That was the best cum I’ve had in my life, sport. Thank you, kiddo.”

Cody is frothing at the mouth, his eyes rolled up in his skull with a broad smile on his young lips. The poor baby boy passed out at the peak of his dry climax, his boyish penis soft and cute once more as it is plastered in obscene amounts of incestuous semen.

- “Kev. Help me clean Cody and get him to bed. He’s all tuckered out.”

“Okay, dad!”

The family of lions stayed for a week at the camp grounds. As if by a miracle, no one ever caught on or mentioned their incestuous debauchery. Even when they, in the company of the men that stayed with them, were parading around with those very obscene and inappropriate pieces of underwear. Easy access for a very special, very thirsty little birthday boy. And Cody never wasted an opportunity to get a ‘milkshake’ from any one of his ‘daddies’, especially when there was risk involved. Or to eat out any of their big manly backsides.

Happy birthday, Cody!