You cannot "force" someone to do something they don't want to do, Scorp.
I'd put this to W in a neutral way and ask what she would like to do in regard to the property. Get her thoughts and input on this matter. Avoid trying to weasel your agenda into the discussion. Zip it. Hear W's thoughts and she may have some suggestions to think about.
Just state the facts and show her hard data. Then ask what she would like to do about this.
