I am so happy for you that you are taking these steps. That is awesome! But be prepared for a big backlash. She won't like it one bit. So, stand your ground. Let her know there's a new sheriff in town and thing aren't going back to the way they used to be. Be firm but calm. Try not to raise your voice to meet hers. Just sit and wait until she is quiet, then speak. The very fact of how you engage with her is going to make its own point. Hang in there. Things will get better. Onward!!