"Sammy…" Dean's husky voice trailed off as he weakly tried to push away his brother. This was wrong. He knew it.
But Sam didn't care. He wanted his older brother. Sam pushed Dean harder against the Impala, kissing and sucking on his neck.
"Sam, please," Dean begged softly; he didn't want to shove away his little brother, he needed Sam to pull away because he couldn't.
"You want this, Dean, I know you do," Sam whispered, moving lower and tugging down his neckline so he could place a kiss on his neck.
"No, Sam, please…"
Sam ignored his brother's protests and knelt down in front of him, undoing his jeans and pulling out his cock, running his fingers over the smooth skin.
"Sam, stop…" Sam took his cock into his mouth, letting his tongue run over his slit. Dean shuddered, placing a hand on Sam's head and feebly trying to push him off. Sam closed his eyes as he sucked; he loved sucking Dean's cock.
They'd done it a few times before, Dean always trying to stop him, but Sam couldn't help himself. He knew he was a slut for his brother's cock, and he tried to get it as often as he could.
He moved his mouth lower down Dean's shaft, taking it all in, feeling the head hit against the back of his throat. He brought up a hand to caress Dean's balls, stroking them and massaging them.
"Sam, we can't…" Sam continued bobbing his head up and down Dean's cock until pulling away. He pushed Dean down by his shoulders until he landed on the gravel. Sam took off his own jeans and boxers, stroking himself.
He got on top of Dean, who gave him pleading eyes to stop, but Sam looked away, knowing if he looked too long he'd give him. He grabbed his pants and groped for the pockets, feeling for a bottle of lube. He quickly slicked Dean's cock, then eased himself onto it, groaning loudly.
He held Dean's shoulders, riding him, moaning in pleasure. Dean's held fell back against the Impala and he bit his lip, eyes closed. He let Sam ride him until he came, Sam shuddering when his brother's hot release filled him. Sam exploded onto Dean's stomach just moments after. He picked up his jeans and used it to wipe Dean's shirt clean as best as he could before lifting himself off.
Dean immediately scrambled up, shoving his cock back in his pants and buttoning it up in a flash. Sam looked up at Dean and he felt guilt.
"Dean, I – "
"C'mon Sammy, have to hit the road," he said gruffly, not looking at Sam. Dean got into the car and Sam pulled on his clothes, getting into the passenger's seat.
Dean stared straight ahead and didn't say anything, while Sam tried to find some way to apologize. He'd taken advantage of Dean, again, he knew that, and he felt immensely guilty for it. He took advantage of the fact Dean would never deny his little brother anything, and he started again.
"Dean, I'm sorry, I – "
"Next case is in Missouri. Look through the victims and see if there's anything similar."
Sam sighed and picked up the newspaper, beginning to read the articles.