Her innocence was going to be snatched and taken without consent. If they did come to her cell, what would she do? Her magic was gone, and she lost every ability to do wandless magic. There was nothing to do. She couldn't stop falling back on the idea that she was going to get raped and then die, maybe fight back, but they'd kill her before she had the chance. Or perhaps they would kill her right away. That seemed better.