Dean sat there, limp and still quivering, despite how much he wanted to do something — and when Cas kissed him another time, he tried to fight back against the lips that encroached on his own, to claim the angel's mouth instead of letting Cas claim his. This clash of mouths did not last long; Castiel withdrew just enough to put an end to it and caressed Dean's face. "You need to understand," he whispered, "just how much I trust you."
Another rush of feathers hit the air between them, and this time, Castiel didn't go anywhere; instead, two sets of wings erupted from his back. The feathers were white enough to make the snow look gray, and Castiel bent one close enough for Dean to finger it.
Piece 1 for my second round at the Dean/Castiel Big Bang. I got the awesome amor_remanet(LJ) and her fabulous and HILARIOUS fanfiction. YOU SHOULD GO READ IT HERE: [link]
This isn't a huge spoiler, but it just doesn't make much sense without having read the story. I think you should do that.
Supernatural © to Eric Kripke, art © to me.