I am basically in the same boat as you. It's almost as if H is trying to shut me out of his life. Is she like this in front of the kids? My kids have been out of town for 9 days, so H can keep this up...I don't know if he will continue once they return. Hope not. I am having a hard time figuring out the best approach myself...but have basically gone dark (as dark as I can be while living in the same house).
I stopped all email/text/phone calls when he or I am not home. When I come in & he is sitting on the couch, I cheerfully say hello - how are you? I think, how would I treat someone if I truly wasn't mad at them...I just didn't care what they thought. I figured, I would be pretty nice. I would engage in a little conversation, if it wasn't reciprocated, I would shut my mouth. I have also been doing things like, when he comes home from work, about 5 min after he walks in, I cheerfully announce while putting on sunglasses - well, I'll see you later. Even if I have to drive around. I will also talk, laugh & joke on the phone in front of him. I want him to know I am NOT trying to pi$$ him off, just having a good time living my own life.
Me 36, Him 33 M 11yrs, T 15yrs S 8, D 7 ILYBINILWY - 1/09 H moves out 10/09 D to be final SOON I HOPE!