If Stiles hadn't have used her title at that moment he would almost certainly have shortly been of little use other than as fertiliser. Something in him using her title managed to trigger just enough self-control for her to withdraw her fangs from his neck. She supported his weight and pressed her hand to the mark to stop him from bleeding out - it hadn't exactly been the most precise of bites.
She picked up the blood bags and tore into them with her teeth and drained them both in seconds. The stuff tasted vile due to the preservatives among other things present in the blood but it fulfilled a need for now. Having gotten her thirst under control she pricked her finger on a fang and forced the finger into the boys mouth. There was no way she was letting him die on her after that.