Sweet little fic, later season first time Wincest -
http://thedropoutandthejunkie.tumblr.com/post/122136153951/hey-your-prompts-are-open-could-i-trouble-you#notes(just in case, I should warn for very mild dubcon, by current standards for that)
Excerpt:
It’s over coffee that it happens, Dean leaning around Sam to put the carafe back onto the warmer, and Sam closes the narrow distance between his mouth and Dean’s. Soft, sweet, and all too brief, the kiss breaks as the carafe thunks a little too hard back into it’s place and Dean steps back with wide eyes. He doesn’t run like Sam expects, nor does he lash out like Sam fears he will. Instead, he lifts a trembling hand to his lips, touching them lightly.