what large teeth I have

Eventually it escalates to Derek breaking into his room to watch him sleep because he just has to make sure that Stiles is safe (and also Stiles smells more relaxed when he sleeps and sometimes he has wet dreams that just tempt Derek). At first Derek thought it would be enough but it's just not, he needs to stick his face into Stiles neck. He needs to scent him and make Stiles smells like him. Derek cringes and wants to growl every time he gets too close and smells Scotts scent on him, even if its faint and he can smell that it's friendly and not claiming. It still grates on him. Stiles should belong to him, not his Beta. He could provide for Stiles better than Scott could ever dream of. He's the Alpha for fucks sake.