Right, and if you get pulled into her drama, she will expect you to end any and all negative comments from your family or friends. This is her mess to clean up.
I want you to understand something, b/c you have been told to expect her to push your buttons. So when it happens, don't get all stirred up emotionally over it. It should be like being told a storm is coming your way. Take precaution, and don't be defeated that it lashed out. If you don't learn how to deal with her actions and reactions in an impersonal way, she will crush you. Be smart when dealing with a WAW.
Try to make some more progress in completing the book.
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!