There is no concrete proof of a PA, and I honestly don't think there is one, but both myself and OM's W know the relationship is inappropriate. I was thinking last night about the text I saw, and I could see a scenario where that is platonic and assuming they are really just friends, I can definitely see how this would make her irate. The problem I have with the scenario with the OM is that they both see the affects it's having on their marriages, yet they continue, and try to fend the both of us off.
The other thing that really bothers me is the guys she was drinking with last night. She's only known these guys a few weeks and so it looks now, that the inappropriate behavior is not limited to OM. That bothers me more than the OM issue honestly, because now I'm really not certain who this person is. She is definitely not the woman I fell in love with and created a family with.
I've done really good working on myself...I'm making great strides. I was even doing pretty good backing off my wife and not applying pressure or control. Now, I think I have to go LRT, and honestly, her behavior makes it pretty easy. I really don't want to be with the person she's become.
Funny thought I had....W and I dated in high school and saw each other for years afterwards, just a few times per year, the occasional card or letter, etc. It wasn't until I really gave up on her, until I stopped chasing her around and accepted she chose a different life that she turned around and chased me. Hopefully, 15 years later, we can see that happen again.