From Protector of the Grey House:
He faced her again, and fought the beast that raged against his control. She looked at him calmly as he expressed his desire.
Natalia had no problem with him drinking her blood. He usually drank at least a swallow each time they had sex. She was unsure about drinking his blood. She had never done it before, mostly because she knew she had to drink his blood to be changed into a vampire. Intellectually she knew he had to drain her first and then give her his blood to change her, but knowledge did not stop emotion. To consider his proposition, she pushed aside her fright. She had never backed down from any challenge. She didn’t want to start when he was giving her rank.
“Don’t skip anything on my account, sir.” She spoke as quietly as he had.
Vincent smiled. “Turn around.”
Cat Stark 