You saw my earlier post to see that you are her new BFF. Do you accept this role? If you do, then keep doing what you are doing and you will continue to be her BFF until she finds another or until she decides that you have been so great a friend, that she wants to try to be your wife again.
If you are not cool with that role, then decide what you need to do to change it. If I read your original post correctly, she has had at least two affairs. What did you do to ensure that they would never happen again.
Last year my wife had an EA. I did the "nice" thing and never even let her know I knew about it. She broke it off on her own accord and things went back to "normal". Now, one year later we are right back where we started. BECAUSE NOTHING CHANGED. THE TIMER JUST GOT RESET!!! I have to do something different this time or I will get the same response. I know I am going to pull the trigger this weekend, I am just trying to decide how big a bullet to use (probably not the best metaphor to use on this site, but you get the idea).
If you are cool where you are because you are too scared to rock the boat then fine. But just understand and be cool with the fact that where you stand right now is one stamp away from divorce.
Me 36 W 40 S 13, 9, 7 ILYBNILWY 2-08 Discovered EA 3-08 Reconciled 7-08 She says she's been faking it 11-09 She wants to separate 12-09