Based on Season 2, Episode 7 "The Usual Suspects"
Prompt: "It's not your fault Dean's your brother – we can't help our family" – Diana
It was one thing in a long paragraph of persuasion, but it was the one thing that stuck with Sam: we can't help our family.
What he would give for Dean not to be his brother. It wasn't that he didn't care about him, or want him around, quite the opposite in fact, but having Dean as his brother made things complicated.
The tension that had been building between them had finally broken not too long ago, after a particularly bloody hunt. They were both tired and wounded and blaming each other for nearly getting themselves killed, when Dean had shoved Sam up against the wall of the motel and started making out with his baby brother.
And all that tension had dripped from their pores as they had sweated it out on the bed until the morning hit.
"Brother" – it was a name worse than any demon they had ever fought – old yellow eyes included. Maybe this is what he had meant when he said Sam was evil?
Not that sleeping with Dean felt evil. But maybe that was the excuse all psychopaths gave – their morals were so twisted that ungodly didn't feel wrong anymore.
Sam knew he would be enjoying it, this affair they were having, if it were not for the fact he felt the whole world was watching and judging – if it didn't feel like that world were inside his head.
The detective was still talking but Sam never heard a word – he knew he had to get to Dean; put this right. Stop this thing between them before it could go any further.
He knew he had to get to Dean so he could feel his hands on Sam's skin once more.