Board Thread:Spoilers!/@comment-5094906-20150503164016/@comment-4839682-20150503180642

Of all the villains", Maleficent seems to be the more level headed. Imo she's smart enough to know that Snow and Charming didn't mean for her to lose her daughter (although their actions caused it so her anger is justified and understandable) and that killing them doesn't accomplish much.

Besides, faced with revenge on them, or helping her daughter lead a better life? She's going to choose Lily every time, I'm sure.