Update 2:

I forgot to add one little detail about the day we had the discussion about the marital bed and her new responsibilities. Earlier in the day, she called me to let me know that she did well in her test but it wasn't enough for her to go on with her course (she did poorly earlier in the semester with her other tests). She told me she was sorry. I told her she didn't have to be and that I knew she tried her best (I resisted mentioning anything about her affair, which I'm sure was a major distraction. I also like to think that her flunking was a natural consequence of her cheating). She quipped about how I should be happy because she won't be around the OM any longer. Then she added, "well, sort of." I said, "Well, that's true, but it's really up to you. He still lives in the area."

What I really wanted to say is, "Well, it's true I'll be happy. But you should also not want to be around him if you want to move forward with our marriage." Of course, I didn't say it because 1) she hasn't expressed any desire to work on our marriage and 2) her out-of-town trip with the OM this weekend is still going on as scheduled.