Derek jumped back when he saw the eyes, his own flashing. Red meant alpha, but Stiles was no alpha. There was no way, no one started out as an alpha. He growled and backed against the door before he got his instincts under control. It'd been a long time since anything had made him jump like that, but suddenly he felt like he might be in the presence of something powerful, naturally powerful.

He watched with keen eyes as Stiles drank the blood and the stupidest idea came to his mind.

"If you start sparkling I'll put you out of your misery," Derek promised and then left. He came back with a bag of deer that was full of blood and held it up near Stiles.

"Want this?"