Show true remorse for what she has done. Be sorry for all the wrong she committed. The lives she ruined. The familes she tore apart. The people she locked away. 🙂 Not once have I seen her look sorry. She and Prince Charming worked together, but not once did she seem even appreciative of how he was willing to let her be with Henry.
When she met Belle in the diner she leered at her, trying to intimdate her. 🙂 When Emma and Snow White risked their lives for her, she wasn’t at all sorry for them falling in the portal. She was just happy that had her powers back.