IronMan - remember not to make assumptions. I found that trying to break the cycle of thinking I knew why H was acting how he was acting really twisted my head and heart. Half the time, I don't think they even know why they do what they do. So, you see her dressy sexy for work and think she's being a tramp. How do you know she isn't desparate for compliments, as mentioned by someone else, or trying to keep a line on you/keep you interested....you don't know and really, as kooky as they are right now, the motivation could change every 5 seconds.
So, as far as the anger goes, it sounds like you are minimizing the impact on your daughter - that's good. I decided that I cannot change my H, but I was going to do my da--dest to keep him for "making me" a bitter, angry divorcee. Her leaving does give you a break to deal with the anger and be able to have some peace/space.
Good luck - thinking of you.
Faith is, at one and the same time, absolutely necessary and altogether impossible. --Stanislaw Lem