From Protector of the Grey House:
“You’re the one tempting me, vampire.” She leaned into his neck, opened her mouth slightly, scraping her teeth on his skin. He growled low in his throat as she gently, then not so gently pressed his skin between her teeth. His growl became louder as her bite came closer to breaking his skin. Natalia felt his hand around her neck and she suddenly found herself on the floor of the limo, with Vincent pressing down on top of her.
“Don’t. Until you can sustain the damage I am capable of, do not bite my jugular.” His words growled past her face, a chill wind threatening her cheeks.