Yeah, he doesn't really see what she was trying there, she doesn't have Infernal Healing any more, and he does... maybe she just thought he'd hesitate too long to follow her out. If so, he can prove to her that she was wrong about that some other time.
Now, before his spells run out, he needs to do enough real damage to Carissa that she can no longer resist him, if he picks her up and carries her off. Break both of her upper arms, for a start. He did rehearse that with Meritxell and she was fine afterwards, though she did yell in pain at the time, and Carissa is stronger than Meritxell. He can heal any broken bones once Carissa is properly in chains. He'd want somebody to do that for him, if he had Carissa's pain tolerance and he couldn't manage to have an orgasm in company otherwise.