It was a lazy Saturday. Ultratails was sitting on the couch with his new, older step brother watching a movie while their parents were off on there honeymoon. The young fox was only eight years old, yet he was watching Deadpool with his older brother and drinking a beer his brother had got him. His brother was a large twenty eight year old blue and white gryphon. He was nearly seven feet tall, towering over the four foot fox, and was trying to prove he could be a "cool" brother. The gryphon was an Adonis of his species. Thin, but well built. The fox would frequently catch girls and guys alike almost gawking at him as he'd walk by in the mall at times. The older male always letting the males down though since he was straight.

The two started the night with some pizza and beer. The small fox having only drank two so far, but already feeling the effects. The gryphon though had drank an entire six pack himself. With the birds size, he had to drink a lot more to catch up to his little brother. They sat next to each other as the movie came to a close, the older male looking down with a smile.

"So. Enjoy the movie little bro?" the gryphon asked of the small vulpine. The small fox looking up with a smile and nodding as he took another gulp of the beer from the glass bottle. The beer was a bit of a fruity IPA. Something the gryphon though the fox may like. It had taken a bit to get him to warm up to it at first though still, claiming it tasted like piss. But eventually he drank more and started to enjoy it.

"Yeah! It was good! Mom and dad would NEVER have let me watch that! Thanks!" the little fox said, leaning over to hug the larger male. Sam let out a small chuckle as he rubbed the kids head between the ears, remembering how he had wished he had an older brother that would do these things for him when he was young. But he guessed this was the next best thing. If he couldn't have had a cool older bro, then he would be the cool older bro.

"Hahahaha. No problem. Want to watch the second one?" the older brother asked, looking as his little two tailed fox brother nodded enthusiastically. The gryphon soon stood up and went to go to the TV to change out the disk. The small fox watching as he blushed a bit. The small fox watching his brothers butt as he walked over there. The little fox wasn't quite as straight as his brother. Not that he'd told him. Or anyone for that matter. He'd always had a bit of a crush on the older avian. After all. He was quite attractive. He'd also noticed his brother had a rather sizable bulge in his pants in the past. This time was no exception. He'd noticed during the movie that his brothers shorts seemed to be getting a bit tighter over time.

The older brother hadn't realized it yet, but he'd gotten a bit stiff during the movie from his drinking. The gryphon tended to get a little loose when he drank, and that was just one of the common side effects. Probably why he tried to pick up girls at the bar time to time when he was drinking at them on his own. He'd always end up a bit horny after drinking, and if he didn't get laid, he usually just jerked off in his room after. Though right now he wasn't really thinking about either since he was spending time with his younger brother.

The small fox blushed a little more as his brother turned around after putting in the movie, getting a look at that semi hard cock barely hiding itself in the shorts that the gryphon wore. He blushed a lot as he quickly stood up as he realized something else.

"I..... I gotta go take a leak!" he squeaked out, starting to walk off to the bathroom. Thats when it hit the older bird too. He had to as well, and at current there was only one bathroom. The second one was currently broken, leaving them both with only one to use.

"Not if I get there first!" the gryphon teased a bit, starting to run. The fox let out a squeak and a huff and started to run too, the two of them running at the same pace nearly, though the fox a tiny bit faster. Tails made it in first and started to close the door, only to find one of his brothers strong paws pushing it open before he could close it.

"C.... Come on! I called it first!" Tails whined out as the large avian barged his way in with ease. He smirked and tried to push the fox out at as the small fox squeaked and grabbed onto the frame to keep himself inside.

"I'm bigger! I get first dibs! You can go after!" he teased the fox before letting go and walking towards the toilet. Slowly the birdy started to pull down the front of his pants, his half stiff length flopping out as he started to take a leak into the toilet. The sound of piss splashing in the bowl filling the air. The small fox huffed as he walked towards the toilet too.

"Well I am not waiting! So nyah!" the kid said, sticking out his tongue as he undid his shorts and let them drop to the floor, pulling his sheath back and starting to piss too. Once he started to let go, Tails looked over and blushed. That was the first time he saw it. His older brother wasn't even fully hard, and yet he had to be at least seven inches long. That length dark black and jutting from his white furred sheath contrasting so well. He hadn't seen anything that big before in person. Not that he'd seen a lot of dicks in person. Whats more with the height difference, it was nearly level with his face. 

Tails let out a small shiver soon after too as the smell caught his nose. A musky, salty, almost beer scented smell of the gryphon's strong piss. He blushed more as he found his own stream fading slowly as he started to stiffen. The small fox blushed as his mouth almost watered at the smell and sight. Normally he'd never think of actually touching his brother. Well. Not for real. But in his somewhat drunken state, he sure was thinking about it, and before he'd even realized it, his tiny paw had reached out to grip the underside of that pissing cock.

"Ahhhhh! T..... Tails?! W..... What are you doing?!" Sam squeaked out as his little brother had gripped his cock and started to rub the underside of it, making it twitch. His brain told him to pull away and scold the young fox, but his cock said otherwise as it throbbed in the paw.

"I..... I don't....." was all the young fox really got out as his paw subconsciously stroked over that twitching cock. God the smell was intoxicating. That mix of musk and piss so strong. He couldn't help himself. He let the cock go briefly to reach down and tug his own shirt off, then gripped it with a paw again, earning a moan as he looked to it. He let out a small breath as quickly he made his move and got up onto the toilet, sitting on it like he was going to the bathroom as he now felt that strong stream splashing over his chest, moaning as he aimed it around some, feeling it splash on his tummy and his own little hard cock and sheath, staining his fur a shade of yellow.

"T..... Tails! W.... What the fuck are you...." was all the gryphon got out as he soon found that little fox muzzle wrapping around his tip. The older brother letting out a moan as he felt his kid brothers tongue lapping around his cock head as he pissed in his maw, hearing the young fox start to noisily gulp down the liquid, though a lot dripped from his maw. He looked down and blushed as he watched his ear year old brother suckle on his stiffening cock as he pissed in his maw. This was wrong, and he knew it, but it felt so good. Especially as that young paw slid up and down the underside of his cock. He let out a bit of a moan as his stream slowed and his cock stiffened more. He couldn't believe what he was letting happen. He was letting his eight year old kid brother suck his cock.

Tails just blushed as he felt his fur dripping with the warm liquid, and feeling that little bit of cock in his maw throbbing. He let out a little whine when the stream stopped, but soon felt it replaced with something else a bit more sticky. He had never sucked anyone before, or even done anything like this before with anyone. But he knew what it was from his own time pawing. His brothers pre was now splashing along his tongue and it was salty and musky, which just made him shiver more. Slowly he slid his maw down a little more dick as his other paw moved up to stroke along the gryphon above him as he felt him stiffen more and more. He could only first about two inches, but it was something.

Sam moaned out as he watched the little fox suckle over him and stroke over him. It was too much. He stiffened right up. His full foot long black cock throbbing as he let another male touch over him. He'd never done anything like this himself. Well. Not with a kid, let alone a sibling, or another male. It was all so new. So wrong. So..... exciting. In his drunken haze he couldn't help but start to be turned on by the sight. Eventually he reached down to rub his little brothers head and start to thrust a bit of dick into his muzzle. He moaned and throbbed more as he thrust the few inches he could. He wanted to push in more, but it just wasn't happening. The deeper he tried to push, the more resistance there was. Not to mention the fox got a little toothy from his lack of experience. It didn't hurt a lot, but he knew if he went deeper, or tried to, it would only get worse.

Tails was happy to feel his brother seem to get a little more into it as well, feeling him thrust as best he could in his tiny maw. He lapped around the head and tilted his maw time to time to try and lick other parts, but he knew he couldn't take much. So he focused on rubbing over the large length with his tiny paws. Even with both he couldn't fully wrap his paws around the body of the length. One eventually made it's way down to those heavy balls that swung in the air like wrecking balls and fondled over them, earning him another moan and some pre.

"T.... Tails..... This feels amazing.... But.... I don't think I am going to get off like this" Sam said with a little whine as he pulled from the maw. It did feel good, but those paws were barely able to stroke him fast enough, or tight enough, and that little muzzle couldn't fit much in. It felt good, but it wasn't enough. He reached down to start stroking himself quickly with the intent of just finishing himself off. But quickly a little paw reached up and stopped him, making him look down at the small fox.

"I.... I know my mouth can't fit much.... but.... Well.... I got an idea." the fox said with a blush. He soon got up off the toilet and quickly headed out of the room. Sam tried to stop him at first. The small fox was dripping pee on the floor from his fur, but it was too late. He saw the small fox head into the gryphon's own room. The large avian quickly followed suit and walked towards the room, feeling his cock bobbing in the air. He turned the corner and entered his room to see his little brother on his bed. He let out a small groan. He was going to have to wash those sheets in the morning. But for now he just decided to get onto the bed with the fox and sat next to him, shivering as he felt a paw reach back out to stroke over his throbbing cock.

"So..... What's your idea?" the gryphon asked curiously. The little fox blushed a bit and squirmed where he sat. The young vulpine didn't say anything yet. A little too embarrassed still. He slowly stroked his older brother, feeling more and more pre leak over his fingers. He let out a small huff before he laid on his back and lifted his legs, spreading them, and reaching down to rub his pre coated fingers over his young, virgin hole. Sam looked on and blushed at what he saw. It made his cock throb just a bit as his mind raced. There was no way the little fox was suggesting what he thought he was.

"I...... I want you to put it in my butt big bro..... I want you to fuck me..." Tails said with a heavy blush as he slowly slid two digits into his hole, using the pre as lubricant. He stretched his hole a little with the digits inside, spreading the pre deep inside as best he could. He reached a foot out carefully and pushed it along that hard throbbing cock that stuck out of his older brothers lap, making it bob around in the air a bit.

"N..... No way! Are you insane?! It would never fit!" the gryphon almost yelled out. He wasn't angry. Just.... Surprised. And scared. There was no way he could fit in his little brother. Not only that, he was under aged, male, and his sibling. It was so wrong. But why was the idea turning him on so much? He thought it must have been the beer. Stupid getting horny when drunk. He knew it would be trouble one of these days. Just never like this.

"I...... I think it might fit. Ive ummm.... kinda..... Put things up there before..... big things.... Nothing quite as big as you.... But big. Please?" the fox asked, looking up with pleading eyes, giving those little needy puppy whimpers. The gryphon sighed as he looked to the fox. There they were. Those begging puppy eyes. The fox knew it was his weakness. He just couldn't say no to him when he made those eyes at him. He let out a groan and a sigh as he bowed his head in defeat.

"Alright. Jeeze. But you can't tell ANYONE about any of this alright? ESPECIALLY not mom and dad. Also if it hurts, you stop me right away okay?" the gryphon said in a defeated tone. The fox nodded vigorously and his face perked right up. Sam let out one more sigh as he scooted along the bed and reached over the tiny fox to open a drawer in his night stand and pull out a small bottle of lube he kept in there for when he jerked off. He soon sat back and moved between his brothers legs and flopped his cock across him. Jeeze. The tip was laying right against the upper part of the foxes stomach. There was no way he could fit right? He undid the cap and started to poor the lube over his cock with a shiver. It was always so cold. He thought about just lubing his tip at first. He figured that once he tried to push in, the fox would just stop him, but he figured he'd just have to jerk off after, so he got himself fully covered.

Slowly he pulled back and aimed that tip down against his brothers little tailhole, smearing the mix of pre and lube along his ring with his tip. He shivered at the warmth that little hole seemed to put off. He blushed again as he saw his little brother reach out to spread his cheeks with his paws and let him see more. The gryphon had to admit. The sight of his tip pressing against something so incredibly small was kind of hot. Eventually he put the lube down and grabbed a towel that he'd pulled out with the lube to clean his paw off before grabbing the foxes legs.

"Okay. When this hurts, just tell me and i'll stop okay?" Sam said to the small fox. He was certain that they would stop before long. Tails just giggled a little and looked up to the adult over him, sticking his tongue out at him.

"Just stick it in already ya scaredy cat! I can take it!" he teased the adult. He wiggled his rump against the tip a little and grinned teasingly at the gryphon above. Sam gave a small little growl as he reached down to grip those little hips.

"You little ass! I'll show YOU scared!" the gryphon said with a teasy growl as he started to pull at the foxes hips as he pushed forward. He felt his tip pressing at that ring hard, but it didn't seem to give. He figured any moment now the fox would stop him. But then he felt it. A little pop as that ring gave way and his fat tip popped in. The two of them moaned out as that tender hole was lewdly stretched around the tip, causing a hard splash of pre to fill those tiny insides up a little. Sam looked down to his his brother sticking his tongue out at him as they sat there.

"S.... See.... Told you I could take it!" Tails teased his brother. The fox squeezed that tip, earning another moan from the gryphon, as well as another splash of pre across those incredibly small insides. Sam let out a huff at the insane tightness around his tip. It almost hurt it was so tight. But more than anything, it felt good. 

"T..... That was nothing silly! Thats just the tip. There is NO way your going to take like. More than an inch!" Sam said in a snarky tone. Panting as he just rested there for now. Not pushing in anymore. His tail twitched about madly behind him as he resisted the urge to just push in more.

"O.... Oh yeah? I... I'll make you a bet! F... For every inch I take, you give me $10. For every inch I can't i'll do your chores for a month!" the fox teased, sticking his tongue out again at the large avian. Sam thought on it for a second. He was confident he couldn't get more than an inch in. That would mean he'd only be out ten bucks, and have his own personal slave for eleven months!

"Your on! Looks like someones gonna be my chore slave for almost a year!" the gryphon teased as he gripped those hips again and started to pull the fox down while he pushed in. Slowly that first inch was slid in. But then slowly more. Two inches. Three inches. Four. Slowly Sam pushed more and more. The small fox moaned a lot, but never did they sound pained, and never did he tell him to stop. The gryphon watched almost in horror as he realized what was happening. He'd been plaid. Slowly more and more vanished into his kid brother as that tummy started to bulge out. Eventually that knot kissed the ring of the child. He'd just slid nine inches of cock into his little brother. 

"I.... I guess I owe you like..... What? Looks like 9 inches.... So $90?" the gryphon said with a blush to the young fox. Tails just panted and shook his head as he squirmed and squeezed over the cock, earning him another moan from the gryphon.

"N.... Nope! T.... That knots gonna go in! J.... Just cause this is my first time doesn't mean I can't take it all!" the young fox said confidently. This made the birds feathers ruffle a bit as he realized something for the first time since they started. It didn't occur to him that his brother was so young that he was likely a virgin. That made him shiver more and start to slowly thrust without thought. He always loved being with virgins. They were so cute and inexperienced. Maybe thats in part why he was so turned on too he thought. Thats when he realized he'd already started fucking the young fox underneath him.

The two of them moaned as the older brother fucked his little brother deep. Sam watched that tummy bulge every time he slid in, only sliding about half his cock out. He moaned as he fucked his little sibling slow and deep, his knot kissing that ring each time, but not stretching him much. He let out a bit of a whine as his mind told him not to try, that he'd hurt him, but his cock was begging to be tied to someone, and if he could take that much cock, he should be able to knot, right?

"C.... Come on brother.... H.... Harder! You can't knot me like that!" the little fox teased, snapping the gryphon out of his own thought of the subject. Huffing and letting out a little growl as he ground deep.

"Y.... You sure you can take it?" the gryphon asked with a moan. He was close already, even with the slow fucking. The tightness and warmth having brought him close already. His thrusts still going as they spoke to each other.

"P... Pretty sure. J.... Just try!" the little fox whined out as if begging for it. That was all the gryphon needed as he nodded and hesitantly pulled free of that tight hole. He quickly rolled his brother over onto his fours and gripped the base of those twin tails hard and tugged them up, earning a loud moan from the small vulpine. He admired the gape he'd given his brother for a moment before pressing his tip right back in as he scooted behind him, pushing right back up to his knot. This time though one paw held those tail bases, and the other a hip as he started to thrust harder. Tails moaned as his front fell onto the bed as his older brother started to fuck him much harder and faster than before. Those hard thrusts starting to spread his incredibly tight hole.

The two of them moaned out loud as they performed their forbidden dance. That tiny hole was starting to stretch as the gryphon fucked him harder and faster. Sam growled a little as he watched his knot roughly beat that hole. It just might fit he thought as he kept going hard. He felt his balls smacking across the back of his brothers own much smaller ones. He didn't notice as the fox had reached down to jerk himself off as he was railed by nearly a foot of cock.

The two kept at it for a while, slowly working that ring more and more until it was time. They could both feel that ring was stretched nearly as wide as it could, and yet it was just a little too tight still. The gryphon just moved his other paw from the tails to the hips and started to pull harder as Tails started to push himself back. The two whining and moaning as the loud sounds of their forbidden deeds filled the room until with one more hard push forward and pulling and pushing of that rump back, that knot somehow managed to pop in. The hole closed hard around the large bulb, taking every inch of cock inside of him. It was too much for both of them. The young fox clamped up hard as he ended up cumming over his brothers already dampened bed sheets as the adult let out a loud squawk as his orgasm hit like a truck. That foot long cock spasming and throbbing as the gryphon started to unload his seed into his under aged siblings ass. He'd done it.

It was almost too much for both of them. They both struggled to keep their composure and sitting upright as they unloaded. The little foxes orgasm slowing after making a few streaks across the bed sheets, but the gryphon's kept going. His balls squeezed tight and twitched as they unloaded their contents into his kid brother. That tummy started to bulge a bit with the seed filling it. Even that hole, while so tightly knotted started to leak cum out and down the inner thighs and the back of the kids balls as more and more of that cream was pumped inside. The little fox almost looked pregnant with all that cum and cock lodged deep inside of him before the older brothers orgasm faded.

The two panted and shivered as eventually the foxes legs gave out, nearly flopping if it weren't for that huge foot long cock knotted inside holding him in place. But it was also too much for the gryphon as he flopped onto his side and pulled the young fox with him, earning a surprised squeak and moan from the tiny vulpine as that motion caused that knot to tug at his hole before he flopped on his side too. The two of them laid there in their afterglow. The fox feeling so full, and the gryphon feeling so warm around his cock.

"T.... Told you I could take it bro.... You owe me..." the little fox teased between huffs. He reached down to feel his bloated tummy. He nearly looked pregnant with how he was bloated. He could even feel his brothers cock throb inside a bit as he squirmed back into the lap while he was spooned, finding his brothers arms and wings wrapping around him in a hug.

"Worth it. Every penny of it..." the gryphon said with a pant. He reached down to rub that little bulged tummy some as well, feeling how it had grown. It made him smirk a little. He'd never felt anyone grow quite that large from just his cum before. He soon let out a yawn, causing the small fox to yawn as well as their naughty deed's, the drinking, and the time started to catch up with them.

"Can I sleep here tonight brother?" Tails asked with a squirm, feeling himself still stuck to the gryphon. Sam let out a small groan as he felt that, squeezing the kid closer as he pushed up against him more, making the little fox moan.

"Yeah... Your not gonna slip off anytime soon anyways. Night little brother." the large gryphon said with another yawn. He reached to grab a blanket and pull it over them, and then some pillows, placing them under their heads.

"Night Big bro..." Tails said with a smile as he nuzzled back into the warm feathery and furry body of his brother. He couldn't help but think to himself as he started to doze off. Best step brother ever.