Okay. This goes back to the thread in Alphaland...(the one about a "good woman would..."
So OA, speaking from your explanation, did HE cheat? or did SHE cheat?
How would you react if SHE cheated on you (any male observer)? Would you after so many years want to get back with her? If she was the "right" one for you? If cheating was the ONLY drawback and she asked for your forgiveness SINCERELY and has not repeated the behavior, would you take her back?