Sorry about the party and your W starting to be more ugly towards you. Hopefully your friends will get tired of her calling the shots of who can and cannot come to their parties and they will stop inviting her and OM (isn't he way older anyway?). I agree that her coldness could have to do with a combination of several possible reasons. I am also sorry that you are feeling used by her, but I am glad you realized it and did something about it before all the papers were signed. You only have the obligation to take care of you and your kids now and I am sure you will do that job well.
As far as you and Heim dancing together--your dance partner, Dina, was telling us how whenever two guys would dance together an ambulance would always have to be called. I guess it would get a little dangerous when they would try to out-do each other. So, be careful, you two!