I'll try to be brief (very brief summary at bottom)
~6 months ago, found out my wife of ~4.5yrs getting emotionally close with a lesbian coworker. I asked her to end the relationship, as my intuition told me (correctly) that this was a threat to our marriage (no previous issues like this in our relationship).
Long story short, she continued it in secret, actively hiding their communication from me. When I caught her one night, she refused to let me read the emails, pulled the computer cord out of the wall, and took off (that was the end of June).
Since then, I've waited patiently and been unwavering in my attempts to reconcile our marriage. She has given lame excuses for wanting a divorce (too incompatible, she isn't happy in the marriage, I didn't meet her emotional needs, etc.). For the first couple months of separation, she was set on divorce and had completely moved on from our marriage. However, according to her, she began to feel intense guilt over the fact that I wasn't moving on and accepting her decision to end our marriage (I stopped working, was fairly depressed, etc.).
She agreed to try some counseling for two reasons: 1) to determine if divorce was "the right decision" and 2) because she was worried about me. We've tried counseling for about a month or so.
For several weeks now, I've had definitive proof that she has been having an affair with this woman coworker. I confronted her about this and she did open up about it more in a counseling session last week.
The issue is that she hasn't really shown any remorse for cheating on me. She has apologized before for "everything she's done to me", but hasn't seemed truly broken over the affair and relationship with this woman. She agreed to stop communication with the OW until she decides what she wants regarding our marriage, but is hesitant to be transparent (plus, we're separated and I have no real way of knowing whether she's honoring her word).
During our last counseling session, I was pretty hard on her, saying she is the most dishonest and selfish person I've ever known, and I don't understand how she could look me in the face after all her lies. She left the session upset (understandably so) and a few days after, said she decided that divorce was indeed "the right choice", though she hasn't filed yet.
My response was then that if she was sure of that course of action, we really have nothing left to discuss and can continue with IC (both with the same counselor who was seeing us together, just individually).
Our counselor made it clear during my first solo session with her that we should continue in counseling together as that would be most effective. However, due to the fact that any interactions with my wife seem toxic right now (and make me feel more depressed and down about life), I said I don't know if I can do that.
tl:dr / Summary
After cheating on me with another woman, my wife is the one who has decided to end our marriage (no divorce filing yet), but does want to process our failed relationship together in couples therapy. I have been resolute the entire time to salvage and heal through this together, but feel my interactions with her are too toxic/unhealthy for me.
I'm wanting advice on how should I be approaching this situation? Should I just wait until she comes back around and wants to reconcile (if that even happens), and spend my focus and energy in the meantime focusing on my own healing? Or should I suck it up, and sit in couples therapy sessions with her trying to process this and heal through it together, even though we most likely won't end up together?
THANK YOU!