I have read the past several pages and have enjoyed the different point of views. I have to, though, agree with Puppy on this one. I think OIN is doing himself and his marriage a real disservice if he doesn't address her bahavior. I don't know that it has to be done now, but it does need to be done.
The first two times my WAS left to run back to her ex, I let her come back without making her "earn" her way back. I was consumed with anger but didn't hold her accountable the way I should have. It was a huge mistake. And I'm sure its why she had no problem doing it this time. Learn from the mistakes of others on here, OIN.