Stiles heard that sigh and he smirked to himself a little. It was too much fun when Derek got frustrated with him and didn't do anything about it. He knew that there was a lot of things that Derek could do to him going to ignore the double entendre there when he was annoyed with Stiles. Which, real talk, was a lot of the time. But he'd just sigh at Stiles and roll his eyes and just be annoyed for a half a minute, then go about his business.
Stiles was nearly finished with the book when Derek stirred and Stiles glanced over at him, eyebrows going up at that sharp inhale. He was going to open his mouth, ask if Derek was okay. But Derek glanced at him, and huffed for no reason at all because Stiles didn't even say anything for once, and covered his head with a pillow. Well, fine then. Stiles returned his focus to his book, intent on finishing it. It was, in a word, a little overwhelming-- okay that was more than one word-- but it was so good. No wonder Derek liked it.
He heard a soft rustling as Derek shifted on the bed, and he glanced over for a moment, eyebrows going up at Derek's but almost in the air. Well, that was.... Well, it was several things and Stiles wasn't going to describe them. He was not in the right mindframe for that. Not even a little.