young teen Sam watching Dean sleep in their bed after Dean woke him up crawling in beside him at 4am. Sam knows what he was doing. What he and Dad were doing. He knows every time Dean does this and it fills his chest with twisted anger and jealousy and curiosity, and he can’t do anything about it so he fights with John every day to try and expel some of the energy. But it’s not enough this time, and Sam needs more.
So while Dean sleeps, he carefully pulls off his sloppy clothes and gently maneuvers his brother until he can see his prize— what his Dad gets to see all the time. But it doesn’t belong to Dad. It’s Sam’s now. Sam stares at the winking hole still dripping with their father’s spend, and he lightly brushes the pad of his thumb around it, then in it, just a little, to tug at the rim and watch him open.
Perfect. His brother is perfect, and he shouldn’t be sullied by someone like John. Sam licks his lips as he watches more cum drip to the sheets below. He’ll just have to remove any trace of their Dad and replace it with his own mark, and when John fucks him next, Sam will just do it again. Every time if he has to.