Wincest

"Dude, seriously, that's the third stop you've speeded past. I've got to pee, man!"

Dean laughed loudly watching Sam wriggle on the seat as he struggled to contain himself.

"Maybe I just like watching you squirm, Sammy," Dean replied, giving Sam a wicked smile before turning his eyes back on the road.

"You're a dick, you know that?"

"Yeah, maybe that's why you like to ride me every night." Sam turned bright red and spluttered, turning to stare out the window as Dean snickered at him.

After two hours, Sam began to whimper softly. At least, what he thought was softly. Dean felt himself getting a hard on; it wasn't his fault! Sam had no idea how hot it sounded; those soft little sounds escaping from his brother made Dean want to bend him over the Impala and pound him into oblivion.

As another gas station stop came into view, Sam began to panic, thinking Dean would drive straight past; he couldn't hold it much longer, and he began to beg Dean to stop.

"Dean please, please man, I need to, please, God Dean…"

Dean bit his lip at how needy Sam sounded and let him continue for a bit longer, even speeding up a bit just to hear his little brother's pleads, besides the fact he was going to stop anyway. The Impala hadn't even come to a full stop before the door was shoved open and Sam stumbled out, trying to hold his pee and move to the bathroom at the same time.

Dean stepped out of the car, rolling his eyes at Sam's ridiculous waddle over to the bathrooms and went in the store, picking up a six pack; the ride to Indiana would be long. He grabbed some bags of chips which would hopefully hold them out until they could get to Indiana to get some food. As he walked out he met Sam returning from the bathroom.

"Surprised you didn't wet yourself on the way there," he said, waggling his eyebrows. Sam gave him Bitchface #27.

"Fuck off."

Dean laughed loudly, dumping the bags on the seat between them and starting the engine. Sam climbed in and they roared out.

Just half hour into the drive, Dean already busted into the six pack, taking a long swig from his can. Sam looked at him.

"You couldn't even wait a full hour?"

"Shut up, I'm thirsty," he snapped.

"You could try water."

"And run to the bathroom every two minutes like you do?" Dean grinned wickedly at his brother and Sam rolled his eyes, but he did open a can, just to wet his mouth.

Not even fifteen minutes later, he was opening his second can.

"Dude, you serious? There's only six and we're not even close to halfway there." Dean shot his brother a look, letting him know if he had more than Dean he was getting punched in the face.

"We'll just stop somewhere else and resupply," he replied, propping up Dad's journal in front of him, eyebrows furrowing as he read in the dim light, continuing to drink.

They finally arrived in Indiana and walked into their motel room. Surprisingly, Sam didn't have to make Dean pull at the side of the road, and he sat on the tapping away on his laptop. Dean crumpled his burger wrapper and tossed it into the bin at the other side of the room, stretching his legs in front of him and admiring Sam.

The little wrinkle between his eyebrows and the concentrated stare he had on the screen was adorable. His hair fell forward and he bit his pink lip as he worked. Dean ran his tongue over his teeth and called out.

"Sammy, get over here, you've been researching God knows what since we started the drive, we're not even on a hunt. Come here," he said, his voice hoarse.

Sam looked at the way his brother's head was tilted and small smile that tugged on the side of his lips. He set his laptop down and came over to Dean, who promptly placed his hands on Sam's hips and pulled him to sit on his lap. Sam shifted, straddling Dean and let him place soft kisses against his neck.

Dean moved up to Sam's jaw before taking his brother's lips, tasting the coffee Sam drank earlier, savouring the taste. Sam bent down, wrapping his arms around Dean's neck tightly, beginning to kiss him roughly. Dean's fingers dug into Sam's side, smirking.

"Still can't get over the fact that my little brother likes it rough."

"You do too."

"Whatever."

Dean bit viciously into Sam's neck, leaving what most people would call painful, but for Sam it was pleasurable, love bites. Sam pressed himself as close as he could to Dean, and it still felt like he was too far away. They made out furiously until Dean grinded up into Sam's hips and he whimpered softly, pulling away.

"Mm, what's wrong, come here," Dean whispered, voice thick and eyes half open.

"Dean, I got to pee," Sam said, putting his hands on Dean's chest and moving to climb off his brother's lap.

Dean grabbed Sam's waist, pulling him back and pushing his mouth back to Sam's. "You can hold it," he murmured. Sam weakly gave in, groaning softly as Dean massaged his tongue using his own.

Ten minutes later, Sam pulled away again. "Dean, I really got to go man." Dean's hands made their way to Sam's ass, grabbing the round, pert cheeks and squeezing the flesh gently. Sam couldn't help it when he felt his back arch and he pushed back against Dean's hands.

Fifteen minutes later, Dean was on the floor with Sam on top of him and he kissed his older brother's chest before pulling away yet again. "Dean," he said sternly, lifting his head.

"C'mon man, you've held it for longer before," he said, rolling them over so he could unbutton Sam's shirt easier, pulling his nipples. Sam moaned, letting the back of his head hit the floor.

After too long, Sam lay on top of Dean again and he felt as though his cock would burst. "Dean," he said urgently, starting to panic and wonder if he would even be able to make it to the bathroom fast enough. Dean mumbled something from his neck where he was nibbling Sam's skin.

"What?"

"Go on me."

Sam almost choked at the thought of peeing on his brother, despite him wanting it. "I can't, you…"

"Sam, just do it." Sam's face burned up with embarrassment and he pulled himself off of Dean, knowing he wouldn't be able to look him in the eye if he ever did it. Dean let him go, a slightly amused expression as Sam did what Dean called his 'pee waddle' to the bathroom.

A week later, Sam was grinding into Dean while his brother groaned Sam's name, pushing up from the leather of the backseat. Dean moaned hungrily when Sam pulled away, looking at him with lust. Sam squirmed a bit and Dean realized the look on his face.

"Just do it," Dean whispered hoarsely, pulling Sam down to meet his lips.

"Dean, I can't," Sam mumbled, kissing back his brother, feeling shame burn in him and he bent to kiss Dean's collarbone in an attempt to hide his red face.

"It's alright Sammy," he whispered, feeling excitement growing in his stomach.

"Dean, I really got to go," Sam whimpered, starting to pull away but Dean's arms clamped around him like a vice.

"Do it," Dean commanded. "There isn't anywhere outside anyway, clear savannahs for miles."

"Doesn't matter, I'll just pee right there. I'll ruin your clothes," Sam choked out, trying to keep his breath slow and even as panic built up in his stomach at the thought of peeing on Dean.

"Don't care man, just go." Dean returned to Sam's lips, sliding his tongue into Sam's mouth.

Sam kissed him breathlessly but he could feel himself about to burst and he couldn't ever live with himself if he had an accident on his brother. Sam began whimpering and squirming, but Dean's arms didn't loosen one bit.

"Dean, Dean I'm… I'm gonna…"

Sam's words fumbled out and he tried desperately to hold himself back, but urine was spilling from his cock and he was powerless to stop the flow. Dean groaned loudly, feeling his brother's warm urine soak through Sam's jeans, then onto his. Sam's arms almost gave out from holding himself over Dean and he collapsed onto Dean's chest, the feeling of finally releasing after so long of holding it in too good.

Dean rubbed his arms around Sam's back, pressing his hips up into Sam's soaked jeans, his becoming almost the same. The pee began soaking through his jeans and his eyes rolled to the back as he felt Sam's urine on his bare skin. A bitter smell filled the air and Sam let out a shuddering gasp as the final drops squeezed themselves from his cock.

He sat up, looking down at his and Dean's crotches, jeans drenched with his pee. His face burned and he began stuttering. "Dean, I'm so sorry, I'll clean it up, I swear, I'm so sorry, I tried but I couldn't-"

Sam's words died down as his brother sat up, kissing him good and long. "Shh, Sammy, it's fine, I loved it," Dean whispered. "We're going to have to try that again sometime."

"You're not… you're not mad at me?" Sam breathed, looking at Dean's face, terrified of seeing disgust or scorn.

"Of course not baby boy, that was hot as fuck. You can relieve yourself on me anytime you want," Dean told him softly, pressing another kiss to Sam's lips.

"Now, how about we get you cleaned up, there's a spare pair of jeans in the trunk," Dean said, fingers moving to Sam's belt buckle.

"But – but we don't have any towels or cloths big enough," Sam said, confused. Dean looked up at him wickedly, tongue licking his lips.

"Who said I'd be using a cloth?"