[ She can't understand his reasoning. The only things left are worse — all the times she was too late to help people, what she said to Madoka that day, the fact she regretted saving Hitomi, even for just a second. What she's already said should be more than enough to condemn her (would be, if she was hearing it from someone else), and if she explained the rest... ]

You know enough. [ Her hands are still shaking, but it doesn't show through in her voice. It's entirely devoid of emotion. ] But if you really think that, then I'll decide instead. If I stay near you, it'll cause problems, so... I'll make sure that doesn't happen. You won't see me again.