She's a little too self important for my taste. Her first line after her release says it all. "Don't you find it oh-so-curious that you would spurn your Dark Lady? Perhaps you feel a stirring of the truth already."
Lady, if Tav gets yeeted off the platform by Balthazar, Shadowheart will stab you without a second thought. I'm pretty sure we know why she spared you and it's not why you seem to think it is!
