I come back to what is your goal? And how does MO bring you closer to that goal?
The ghosts in my house are the happy memories from before BD and the god awful ones after BD. That and the feeling of emptiness when he has the kids (which is a lot).
... but I have come to accept the ghosts and the quietness and am comfortable in it ... you will get there too.
Will she MO - I don't know. She might stay just to spite you, or she might, in the cold light of day, look at her finances and decide that living in an apartment is going to leave her without much money (difficult to live a WW life when you have no money in the bank).