Wincest + Season 4 + punishment (Sam being punished to be exact)
“You wanna know how you can make this up to me?” Dean says, and his voice is cool as he looks down at Sam, his mouth smeared with Ruby’s blood.
Sam swallows hard, his jaw tightening. Shame gathers in the pit of his stomach, and he honestly thinks he could be sick. “How?” he whispers. Dear God - will there ever be a day that he doesn’t royally fuck up something?
“Let me punish you.” Dean bends, so he can get his fingers in Sam’s hair. He’s gentle as he strokes it to the side, behind Sam’s ear. “Let me punish you - and then let me help you.”
Tears gather in Sam’s eyes. “Dean, I’m beyond saving. Believe me. Look what I’ve already done.”
“Don’t,” Dean says softly, his voice firm. “You’re not beyond saving, Sam. You’ve been manipulated. You’ve been abused. Now let me help you get out of this.”
The floodgates open, and Sam’s crying openly into his hands. He can still taste Ruby’s blood on his lips; Jesus, Dean had seen him do that. “What do I do?”
Dean licks his lips. “Take off your clothes.”
Sam’s head snaps up, his face hot. “What?”
“Do you trust me?”
“Y-Yes...”
“Then let me make you atone for your sins.”