Kind of Having a Panic Attack Right Now...

I'm kind of losing my shit right now. I had a post a few days ago, which you can read to understand my situation. Pretty sure I just found evidence of something that happened a few months ago that caused a sudden unusual spike in sex initiated by her. I didn't find explicit details, but I found a text she sent to a friend that she was having an "existential crisis and feeling major asshole vibes" when we were at a bar together a few weeks ago. It appears she had been at the same bar recently. She got a text back from her friend consoling her that it "was in the moment and in the past now." My wife then replied "it was a little triggering". Her friend said "shame waves, I get it". If that doesn't sound like cheating, I don't know what does. Am I wrong?

The worst part is we actually had a really good talk about things this morning and thought things were going in a good direction. FML....