Don't talk to kids until absolutely necessary. Then tell them the truth, but in a compassionatly.. Reassure them.
What is best for YOU? Personally I think that unless she commits to ending A and working on ye, you should keep moving forward with sale, or at the very least come across to W that that is what you want.
Her being hesitant is good but keep to your path. I would hear her out about her wanting to think about it.
Best wishes
R 25 years M 14 years S11 & S13 Working on it alone since Oct 2014 M in trouble a lot earlier (~2 years) Feb 2016. 1st R chat in a yr. Next R chat Aug'17 Still together