People seem to forget how brutal she is to people she deems deserving of her wrath. She tortured that Justicar with a grin in Chapter 2.
I mean most were rotten, some people need to die But it was indeed still a brutal thing to do, enough she still has nightmares about it.
If you don't remember, Dale's "child" is actually her niece, who she decided to take in and pretend it was her and Witch's daughter. And she was projecting enough of her brother onto her, she thought it was better to kill her for a split second,