Sometimes that is the only way. Remember, you can't change her, you can only change yourself and the way you deal with her. That may mean avoiding her when don't feel strong enough to deal with her and when you feel like you can deal with her don't put up with her attacks. Just be a broken record repeating over and over "when I hear words spoken like that it hurts me. I will no longer put up with being hurt." Use only I statements, practice in front of the mirror or to a tree in the park. It is hard to learn to use "I" statements and it does need a lot of practicing.
Carrie

<font color=green>Not knowing when the dawn will come, I open every door.--Emily Dickenson