This came to light after the wedding, and a tremendous amount of drama ensued.
Before this all happened, a bunch of us (between fifteen and twenty, depending on the week) would go to a local Irish pub on Thursdays, because they had Irish musicians in every week.
After the cheating news broke (which is another painfully stupid story), the married couple stopped going for a few months. I'm not sure if they went another night, or what.
Anyway, one night, they decided that they were going to the pub, because the wife "needed closure".*
I immediately knew that this was a Very Bad Idea. Wildly dysfunctional people, Irish music, alcohol, and feelings of betrayal are not the flavors that one typically uses to make a Serenity Stew.
While most folks went to the pub, to enjoy the music/witness the carnage, I decided to stay home. I knew that I would have to deal with the trauma afterward, so I just made a lunch date with Joanie for the next day.
Well, the scene at the pub was a shitshow. It started with cold stares, and angrily-mumbled comments, but, by the end of the first set of Irish music AND lots of alcohol, the wife and Joanie started screaming at one another, and Carla slapped Joanie.
So, Joanie and I had a lot to talk about the next day.
Joanie: ... and then she slapped me.
Me: *sigh* I tried to tell them that this was a bad idea...
Joanie: And I saw how Matt was flirting with Rowan**. If he's sleeping with her...
Me: I don't think he is...
Joanie: Well, if he is, after all the Hell I've been through over him... I'd just probably go crazy and kill them both. Then, I'd go to jail and no one would ever see me again.
Me: (thinking to myself): I know I should say something supportive here, but I don't know what...
Me: (out loud): I wouldn't worry about it. If anyone can cop a plea of diminished capacity right now, it's you.***
Joanie: (stricken look)...
Me: (Realizing what I said): I mean that in the best possible way.
Lunch was very uncomfortable after that.
Joanie is now married with a child of her own. Matt and Carla are still together with two children. I know this from mutual friends, because I no longer speak to any of them.
*Honestly, in cases like this, people don't normally want closure. They want the last word, which is a very different thing.
**They weren't flirting. At the time, they (and their partners) were just spending a lot of time together.
*** Honestly, I was trying to be helpful. There are reasons why friends have told me that "No one turns to (me) for comfort."