She tried hard to deny it, but she was a monster. She had killed every night since she had gotten the curse, but somehow she was able to distance her from the Thing.
The truth hit her hard and even the Bastet trembled when she saw herself through Merlin's eyes. How could he look at her with such acceptance and love? She should be dead if her fate was to destroy everything she loved around her.
Her true nature was reflected in Merlin's gaze and though she hated herself, for a moment she felt beautiful. His love made her beautiful.