Stiles was obviously struggling against his more primal nature. Part of him wanted to attack Derek, wanted to rip open his throat and feel hot blood gush all over him. He wanted that so badly his body shuddered and his hands clenched into tight fists as he fought against his blood lust.

It would be so easy. He could just tell Derek to let him feed on him -

He ended up biting down on his tongue just to keep from using his newfound powers against Derek. He could never do something like that. Not even to the likes of Derek Hale.

"I don't think I can....."