Good to hear your kids are with your parents. It'll be a nice stress-free weekend for them.
Your W is carrying around so much guilt. She is projecting that guilt onto you. When she says you treat her like a whore it's because that is how she sees herself (on some level). She is self-destructive right now. She'll continue to be until she hits rock bottom. Unfortunately you can't save her from herself, only she can do that.
Work on you this weekend. Do something for yourself and don't give a second thought to your sitch or W when you do it.
Me: 39 H: 39 S: 15 M: 18 years Bomb: 6/3/09 H moved out: 10/15/09 H moved back:5/30/10
