if you do confront her, and I can't say whether you should at this point but if you do, you have to bring up how it's not just you she's hurting. There are children involved. I know she doesn't want to hear that but tough. I guess I don't see a reason to bring OM up if you are also NOT ready to "do" anything about him.
What's the point? To show her you'll still put up with it? To push in both your faces that you are tolerating the intolerable? I have a hard HARD time believing it has not gotten physical, if that matters to you. I don't know that it should, but to some men, the reality of a physical affair motivates them more than feelings.
All I'm saying is before you confront, have some clarity about what you're going to do if she is or isn't with OM. Be ready. Otherwise it's an exercise structured for failure.
Good luck and I agree that if the old you left over a year ago, she's really got no right, even in the world of the EA fantasy. You changed. The marriage can improve with effort from both. So now what's the problem? j
M: 57 H: 60 M: 35 yrs S30,D28,D19 H off to Alaska 2006 Recon 7/07- 8/08 *2016* X = "ALASKA 2.0" GROUND HOG DAY I File D 10/16 OW DIV 2/26/2018 X marries OW 5/2016