I'm not going to help my wife workout after she cheated
Do you think that's a good idea?
I think it is because she has been so lenient on my infidelity.
You two need counseling. You both cheated and I see no end to that path.
I don't need counseling to tell me that it's not my fault that I'm weak and she's to blame for everything.
You can't assume what will be explored in therapy. Every therapist has their methods and you might find one that works for both of you.