[X] Correct her. You can't stand being thought of this way. You've never eaten anyone, never killed anyone. You want Bell to know this. You need her to. You'll dodge the question of what actually happened, or think up a lie to explain your silence as an act of fear, the person's escape a simple failure. But you have to do your best to make that much clear.
[X] Tell the whole truth. It's stupid. You know it's stupid. It will make her hurt you. Maybe she'll even tell Fleshrender and give him that excuse he's looking for. But you can't stand this. You can't sit here in the ruins of your old life and watch your new life threaten to tear it apart and stay silent. Maybe she'll understand, maybe she won't, but you can't handle having nobody who even knows.