Brother... I feel your pain. It's very hard to deal with that while she is in the house.
Not sure what advice I can give you other than to keep posting on here.
I'm in a similiar situation, my W is out in her own apartment. The one thing I can tell you is that you have to let the PA run it's course. While she is in the "euphoria" stages, there is nothing you can so or do to convince her she is in the wrong.
Best thing is to continue with GAL (that's for you not her) and taking care of your son.
