It's a beautiful thing to watch, Castiel letting go like this. Sam slides his other arm around Castiel's waist, pulling him back against his chest. He turns his head, murmuring to Castiel how good he is, how good for Sam he is. Gentle praise as he works him through his orgasm.

When he finishes, Sam gives another couple of strokes before letting Castiel's cock go. He brings his hand up, tasting the come on his fingers before smiling. "Maybe, in the morning, I'll suck you off before replacing the chastity device, hmm?" His fingers stroke gently over Castiel's stomach. "You gonna be okay on your knees, Cas?"