I am not saying this to disagree with CityGirl, or anyone else for that matter. This is just my opinion of what I would do.
A few clues.... RE Agent said your W sounded stressed (shocker!) Your W may not be looking very hard for an apartment Your W doesn't WANT to mess with the house, she just wants it sold.
You can hire a cleaning service if you like, probably doesn't matter one way or the other. I probably would not send her the bill.
Again, this is a guess, but I believe has some validity. Finances have your W terrified.