Also, after you've had some time to process, would be interesting to hear your opinion on "to confront, or not to confront" for the benefit of others on the board.
I think in my situation I had to confront her because first, she didn't have any idea that I knew about the A with OM and secondly, I needed to confront her for myself, that I wasn't going to be a floor mat for her to walk on anymore.
She became somewhat defensive once I told her about the A and OM and she started with some excuses, but then she basically stopped denying it. She wouldn't come out and admit it or anything, but never denied it.
Shortly after my W left me, she started drawing a line in the sand that basically said that she was done. Everything that she has done since that time has been done to reinforce her decision and nothing I do can change that (that's where be a "fixer" won't help me any). Now I am assuming that she is only saying she is done is because she wants to be with this OM and this is just her way of justifying it. If anyone has any other thoughts, please feel free to share.
Me36, W38 S12, S3 T20, M4 Bomb dropped 8/18/11 Moved out 8/18/11 Filed for D 10/20/11 OM Confirmed 11/5/11