Of course she will say nasty things about you. That's what waywards do. But you have to stand up for yourself. She will badmouth you whatever you do so you might as well have some self respect to not allow someone who is that disrespectful to be invited. You have to show your children the consequences of acting as your W does. That is your responsibility to your children.
Me:49 W:45 M:19 T:22 EA confirmed and ended 8/2014 S:19,17 D:9,5