I know I will get $hit from this, but I've zero hard proof of an affair, only suspicions from feelings or 1/2 truths. My suspicions that there could be an EA with a guy from out if town or she could have already had affair with someone else here in town...both could be argued away easy by a crafty woman for sure. I have my doubts for her fidelity but if I'm wrong, if she is just been a pi$$ed off fed up woman who had had it and disconnected from her husband... I've never gotten the I want a divorce talk either.
Does this change anything from what you've written until she is ready to talk about what has been going on in her head?