It's definitely a relief when Castiel doesn't fight him any more on finishing the scene. Sam sighs, closing his eyes a moment before he stands and goes to sit on the bed, carefully not touching the skin of Castiel's back.

It's definitely difficult to look at and he knows he handed out far too much punishment for what had happened that night. He looks it over closely, though, and nods finally, satisfied that the skin didn't split and that Castiel was mostly okay. He pulls the sheet over Castiel, knowing he won't be able to take anything heavier tonight. Possibly not for a few nights.

Then he goes around the bed to climb in on his side, moving over so that he's right next to Castiel. "Come on," he says softly. "You can use me as a pillow tonight, yeah?"