FSE

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Part 1: https://sofurry.com/s/mBBv8jZm

Kurt threw the swimsuit aside and grabbed his brother's head again, shoving it towards his lap.

Carter didn't have to be told what to do. He bristled at the way Kurt was manhandling him, but he wasted no time getting his mouth around it and sliding his tongue against the tip to lap up a mouthful of salty pre. He had to open his jaw wide to fit the fat sausage inside. It felt like he couldn't do enough. His lips barely reached a quarter down Kurt's meaty length, and every time he bobbed down to try to swallow more, it threatened to trigger his gag reflex. He put a paw around the base of his brother's thick cock, stroking gently up and down in time with his sucking, hoping he was doing good enough.

The lion rumbled and purred above him, still gripping his head fur painfully tight. “Mmh, fuck, man. You're good at this. You're doing so good. But you know what?”

Carter knew the lion was about to be an asshole, but he didn't have time to react.

“I think you can do better.” And with that, Kurt forced his brother's head down.

The salty taste filled Carter's mouth. The meat slid far inside him, stuffing his throat. Kurt's hips jacked up, thrusting again and again even deeper than Carter had realized he could swallow. He couldn't gag, couldn't breathe, couldn't do anything but beat a tiny, weak fist against Kurt's thigh and blindly hope the beast would let him go.

“Alriiight.” The lion chuckled, taking his hand off. “Take a break. Harder than it looks, huh bitch?”

He playfully ruffled the mouse's ragged head fur, while Carter spluttered and spat, wheezing for breath.

“Asshole.” Carter seethed.

“You loved it.” Kurt grinned, lying back again and stretching his arms out above him.

Carter didn't respond, too busy staring at the way the lion's abs flattened into a sleek hollow when he stretched, his chest puffing out with its massive ribcage, his pecs flexing against each other, his dirty armpits with their rough bundles of black and oily fur that smelled like the locker rooms at school. All those times he'd stolen secret glances, or tried not to stare ... and now he could finally stare. He could finally just openly gawk at Kurt's godlike body. He wiped a string of drool from his muzzle.

Actually, he could do more than stare. He let the smells guide him, his tiny pink nose twitching as he leaned forward, crouching over Kurt's chest. Kurt settled a warm paw on his back, expecting another kiss, but the mouse buried his nose into the hollow of his armpit, greasing his muzzle with musky sweat. It tickled, and sent an odd thrill of pleasure through the lion's back.

“Oh damn, bitch, you really are into this shit, huh?” He purred in smug satisfaction. “What a dirty bitch.”

Carter whimpered. “I-I’m sor–”

Kurt shushed him before he could apologize. “Relax bro,” he pushed his whiskers into the mouse's, brushing his fangs against the soft trembling lips. “I'm into this shit, too.”

He pulled Carter into another kiss and they tasted each other's muzzles, now salty with sweat and cock-musk. It was a hard, rough kiss, but it was over quickly as Kurt pulled away, pushed the back of his paw over his mouth, muttered “fuck” and started to get up.

Carter let a squeak escape him, suddenly terrified that they'd gone too far, that Kurt had gotten scared or just lost interest, and everything they had could slip away in a split second …

But Kurt got behind him and grabbed the mouse's hips in a clawed grip. Carter felt warm, muscular thighs settling on either side of his own. The hot flesh of the lion's thick sausage slid into the soft cleft between his cheeks.

Carter shivered. So this was it. He remembered what Kurt's finger had felt like, fat and deeply buried inside him. His cock was at least twice that size. Would it even fit?

The answer came in a painful shove that brought Kurt's rounded tip inside. The lion leaned down over the mouse, bracing himself on the bed with one paw so he didn't crush Carter with his weight, and sliding his other paw back and forth across the mouse's soft, flat belly. His chest pressed against Carter's slender back, feeling like a furnace wrapped in muscle.

“Hope you've been practicing, bitch. Cuz I’m not goin’ easy on ya.”

Carter squeaked. It felt like he had to gasp for breath. His heart had never beat this fast or this hard. He had practiced before, but Kurt's dick was bigger than a finger, bigger than the carrot Carter had carefully stuck inside himself, bigger than anything he'd ever felt back there. And it already hurt. Would it keep hurting like this?

Kurt gave a ragged growl as he pushed himself deeper. The mouse's virgin ass gripped like a python around his meat, like it was trying to suck him deeper inside and crush him at the same time. It was hot, almost burning hot, and slick with juices. With a purring rumble in his chest, he kept on inching his hips ahead, sliding deeper.

Carter swallowed a dry gulp of air, trying and failing to breathe slowly. He squeezed the bedsheets in white-knuckled fists, panting uncontrollably now, sweat dripping in hot paths down his ribs and arms. It felt like if Kurt went any deeper then he'd split him wide open. And then with another bright flare of pain, he heard a grunt and felt a slap of plump balls against the back of his own sack.

“Oh fuck …” Carter whispered.

“What a dirty mouth,” the lion muttered, moving his paw up to blindly feel around for his brother's muzzle, “You should keep quiet if you don't have anything nice to say.”

Kurt shoved his finger between Carter's lips again, and the mouse gratefully accepted it. It was something to focus on, something to suck on, something to gently bite down on as the searing pain in his ass finally started to fade and be replaced by a tingling pleasure. The warm fullness pressed against the fleshy knob inside his ass, rubbing it as Kurt thrust again and again, harder and deeper every time. It felt like scratching an itch, but better than anything else had ever felt.

The mouse's finger had never felt this good. The times he'd jerked off staring at porn had never felt this good. In all the times he'd imagined getting frisky with Kurt, he'd never once imagined it would feel like this. If Kurt wasn't gagging him with a finger he'd be screaming right now. A few squeaks and moaning noises escaped him every time the lion drove his hips against him. Carter's cock was steel-hard, quivering and straining for release as it stood fully erect between his legs, brushing against his belly. It felt like something was squeezing it hard, even though nothing was touching it, not that he would have touched it anyway. The only thing he cared about feeling anymore was the giant cock jackhammering his ass, the taste of his brother's fat thumb stuffing his mouth, the musky scent of a horny lion all around him.

He didn't even realize he was spilling his load until he felt Kurt's chest begin to rumble and then the lion clutched him with both paws, digging his claws into his brother's thin grey chest, and gave an ear-splitting roar. His hips pistoned his huge rod again and again deep into Carter's belly until the mouse felt a squeezing pressure build up from beneath his balls and finally shoot out the tip of his cock, painting the sheets beneath him with milky spurts, white on white.

He gave a long, loud, pathetic whine. It was all he could do; he felt like he was about to pass out. It felt so good, it was too much and he didn't know how he could handle it, it was just so much, so much thick lion-spunk pumping into his belly in warm jets, so much musky scent, Kurt's roaring was so painfully loud, his clawed grip was so tight and deep it was drawing blood, and his cock was so big and long it was making bulges in Carter's crotch with every thrust.

As the lion slowed down, he started to collapse onto his brother. He kept thrusting weakly as they both sank flat onto the bed. Carter ground his still-leaking cock into the sticky puddle of cum he'd made. Kurt pulled out with a heavy, shuddering sigh, and flopped over to lie next to the mouse. Carter rolled over and licked his brother's muzzle. Kurt kissed him back.

“Oh my god, are you ok?” He pawed at Carter's chest, touching the bleeding scars his claws had made just a few moments ago.

“I'm fine, really. It's ok.” Carter made a mental note that the big lion wasn't as much of an asshole after he'd emptied his load. “Just don't let Mom and Dad see.”

Kurt groaned. “Fuck, don't remind me.” He leaned back, stretching his arms behind his head.

Carter crawled over to lie on top of him, laying his head on the thick mane. Both of them were covered in sweat, cum and blood. The room smelled like sex and wild animals.

“You're getting it on me, dude.” The lion chuckled, making a face at the blood smeared onto his fur.

“You needed a shower anyway, dumbass.” Carter murmured. He wanted nothing more than to go to sleep on the warm, firm muscle of Kurt's chest, but the stress of imagining what it would be like if their parents walked in on them like this …

Kurt licked the top of the mouse's head. “Then let's go get cleaned up.”

He gently moved Carter off him and the mouse reluctantly got out of bed and stood up. His ass was sore and his legs felt like jelly. The room seemed bigger and colder now. Being naked had made him feel frisky and excited before; now it just made him feel exposed. The moment was over. Now that his head wasn't fuzzy with hormones driving him to breed, he was sobering up into a ball of stress and anxiety again.

“W-what about the bedsheets?” He pointed out. A dark wet patch of jizz stained the center of the bed, and a splotch of crimson blood.

Kurt sighed as he slid off the bed. “Relax, runt.” He put his hands on Carter's shoulders, gently kneading them in a massage. “We'll just say we had an accident with, I dunno, the coffee maker or something. Fuck it. Whatever.”

He brushed a pawpad gently over the fresh scars he'd cut into the soft white fur of his brother's chest. “I'm really sorry man. We'll say we were just roughhousing, and … and I went too far. I deserve that.”

“No.” Carter drew his paws up over himself, covering the blood. “They won't see it. I won't let anybody see.”

“Dude. They'll see eventually.”

Carter looked at the floor. He knew Kurt was right.

Looking up again, he met his brother's warm golden eyes. Kurt was giving him a lopsided smile to reassure him that everything was ok. The big chunky fangs that usually annoyed him so much, reminding him of the unfair size and power of the big cat, instead reminded him of how it felt to kiss them, and how gentle Kurt could be despite his size … and how rough he could be too, and how good it felt when he got rough in the right ways.

Carter wanted to thank him for … for what? He wondered. For breeding him like a feral animal in heat? For making the first move and taking the lead? Carter wondered if he'd have ever had the courage to just come onto his brother the way Kurt had done to him. Maybe they never would have rutted, never even kissed. There was so much to say, but they could talk about feelings later, now that they both knew where they stood. So Carter just leaned up, and pressed his lips against the lion's broad muzzle.

When they both came up for air again, Kurt was grinning wildly. “We should get cleaned up before they get back.”

“I know.” Carter laughed into Kurt's mane.

“Come on, come on!” The lion tugged him along, and they stumbled into the bathroom together.

After a hot shower, they got dressed and tried to watch TV, lying on their own separate beds like normal animals. Carter had tried to jerk the lion off in the shower with a soapy paw, but they were both too nervous and exhausted for a second round. They both had wild dreams that night, and in the car the next day they couldn't stop thinking about it for a second, planning what they would do next time they got to be alone together.

They settled back into an easy routine of being a pushover and a swaggering bully, but there was no going back to being just regular siblings again. Carter wasn't sure if he would call it a relationship. He thought of it as “just a thing.” Kurt tried not to think about what it was at all. He just knew it felt good, and he liked it. And Carter was still his brother, and he still liked to pick on him, and he'd still protect him from anything. They were still brothers. But things would never quite be the same.

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