If you are going to be gone and only come back on the weekends how would you possibly be able to work on the M ... the one she wants out of?
Whats that rule about NO R TALKS .... you are allowing this 'deadline' to control what you are doing, I would suspect fear that while you are gone W will do what she wants, well M or not she will do this, you pressuring her .... would be esier for her to say "Suuuuure lets work on that M, here is your suitcase buh-bye". She has fired you, pressuring for an answer will not get you anywhere, nor do I suspect at this point would it be the answer you are hoping for do you?
This is a tricky situation lined up, W has the luxury of having you gone during the week, You coming back to babysit on the weekends. I would really sit down and think about what you want to do here.