GH, At least you now know the truth behind the lack of intimacy.
SS gave you some wise advice:
Quote: I know there was much discussion of implementing a no contact rule. I would say that is a waste of time. She didn't consult you when she started the A, why would she ask your permission now. If you make it an issue it is only likely going to make her want to see him more. Eventually, she will grow tired of him, and end contact on her own.
Keep doing what you have been doing. Do not throw in the towel just yet. Alot of us are DB'ing in the midst of an A. Your W is very confused and as much as I and others would like to smack her upside the head, she has to figure out what is important to her life. Continue to be the wonderful man, husband, father that you are (maybe minus the backrubs) and I promise the A will fizzle out on its own. Hang in there!!