As far as how long he has been seeing OW, I don't know exactly, but from what I understand, he started having probably what I would believe to be an emotional affair maybe in September/October? Then, if I believe him (and it would be consistent with about when he started "acting noticeably strangely around me"), the physical affair started around the end of October. I found out about it on November 15th, and he told me around the end of November that he had decided to give our M another chance but that he didn't not for sure when or how.
