You could always go back and kill her. That might make you feel better.

[...] Or not. I watched her die, and it was terrible. She wouldn't let me save her. Even knowing she'd betrayed me, betrayed England, I wanted to save her. Was it like that for you? Did you still love her? I've spent every day since she died convincing myself that I never really cared for her, but I don't think I can.