I don't think avoiding her will work every time. You need to get her attention by firmly telling her that until she convinces you that she wants to work on the MR, you do not want her dropping by the house and sharing your weekends with the daughter. She needs a wake up call.

When WW's don't get to eat cake, they don't like it. So what? You must not be concerned with her portraying you as the bad guy, b/c that is what WW's do. You don't live your life to please her! And people will think what they want to think........you have other things to worry about. Can you see this is just another way she is controlling your life? You are the only person who can stop it.

It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!