Hi Pro. I'm sorry you find yourself here at the best club no one wants to join.
Gently, from what you've written what comes across as someone who wants to stay married, perhaps no matter the circumstances. I understand that - it's natural to have a need to try to return to normalcy in the face of this sort of trauma. I felt exactly the same way when I found out my WW had an A the first time I found out 13 years ago. So I believed everything she told me and then went ahead with the world's biggest rug sweep. It was one of the biggest mistakes of my life for sure. There were no consequences for my WW and she was emboldened to continue in what turned out to be the mother of all serial cheating lifestyles.
The reality is that in the overwhelming majority of situations we see here, the BS does not get anywhere near the full truth in the beginning. Your WW is doing what waywards do - telling you the minimum and hoping to get by with it.
Serial cheaters like your WW and my exWW are their own breed. You know that guy at your club who regularly "identifies his ball" in the rough and magically places it back in a fluffed up lie, always mistakenly sees the ball entering the penalty area 40 yards closer to the green and rakes in every 4 footer he sees? He never stops doing it. That's what he does because in his nature. And you can tell him to put a mark on his 4 footer but there's not much you can do when you're on the other side of the fairway and he's "identifying" his ball in the rough. He'll always find a way to cheat. It's the same thing with our serial cheating spouses. In my experience, it's not likely at all that your WW will change and become faithful and that's something you need to come to terms with.
For now I think you need to get the full truth. You can use a phone recovery app to recover her deleted texts. You can ask her to write out a full timeline and including any EAs and PAs during your M and tell her that you plan to take her to a polygraph examiner to confirm - in particular with questions about whether she's cheated with anyone else during your M and whether she's told you the truth about this PA.
Hang in there and good luck.
