The last night, Dean had came from a hunt with several injures, and fainted Infront of Castiel when he barely entered the bunker.. That was bad. Castiel couldn't let Dean on the floor, and he didn't wanted to leave him alone on his room so.. Castiel took Dean to his own room, whose instead of having a small and rectangular bed, it had a medium large round one with pillows and no sheets (Angel's prefer a big space with fluffiness, but that changes with Archangels, the same with the arrangement of with who they share the bed.)
The next morning, Castiel was spooning Dean, and he had him on his embrace, covering both of them with his wings, being like a giant sheet.. It was rare for Castiel to actually show his wings, but he did today whatsoever. Sam was probably already awaken, but that was of no importance right now.