Derek considers things for a moment and then butts his head against Dean's shoulders before slinking over towards his haphazard clothes pile. He shifts with his back to Dean and pulls on his jeans, zipping them as he turns around. "That's because I couldn't."

His voice is rough from misuse and he clears his throat as he heads back over to Dean, hands in his pockets. "Only alphas can fully shift, and I've been an alpha for less than a year."

Talking about it only makes him sadder about Laura, because her dying is the only reason he can shift at all. "Had to get away from all the -" He flaps his hand towards the city with a frown. " - Christmas shit. What are you doing out here?"