The steadiness of her heartbeat told Dracula all he needed to know. She believed the words that she said. She had faith in her superiority over him. This child of Abraham's bloodline did not fear him. She did not lie, in so far as she understood the truth of things.
"We have no bargain," he decided. "You may have defenses against my strength, but I serve no master or mistress. If you make demands of me, then know that you compel an unwilling participant in your games, and let that lie upon your human conscience as it must."