Magic, huh? That seems to be the cause of all the troubles. Belle's expression betrays her completely when it falls into something between guilt and resentment. "I'm--" She doesn't want to trust this person, even if they are Henry. Could she live with having just another secret to hide? She buried Anna in her memories for so long that she had almost forgotten about it.

Why is she even considering doing such a thing again. "I had it in my hand when I appeared here." She is a terrible liar and it probably shows. She isn't holding the dagger for no reason. "I was. . looking at a mirror before this." There, that's not a complete lie. Maybe she isn't telling the whole story but at least she said some of it.

At least she doesn't have to mention how she just shattered her true love's trust. She looks away.