Derek rolled his eyes at him so hard. "It gets cold up there. We'll get a real bed for you. If the couch becomes a problem, maybe I'll let you share my bed, but the couch should be fine." He shook his head a little, deciding Stiles needed a smack for being so obnoxious as to think Derek would put him up in a cold cubbyhole of a place with no real warmth and barely any light at all. That was just mean.
Stiles lectured him about his books and Derek sighed tensely. "This is starting to sound like we got married," he muttered, mostly to himself, and he shook his head, looking out the window until Stiles asked about the books he had in New York. "Most of my bedroom was filled with them. Six years of boredom to fill, and Lau-- my older sister bought me books for every holiday." Even though he didn't like to celebrate birthdays and Christmas or anything like that.
Derek watched Stiles lean into the back and glanced over the way he was bent towards the back of the car. When he smiled Derek huffed and got out of the car, shoving the door shut. "So, whose place first?" He was glad it came out better than his attempt at asking it earlier.