Pissed off with my friend

[Playbookpage13]

I know that I’m unreasonable but this has just pissed me off. We are part of a friendship group and occasionally go for a night out together just to unwind a bit. One of the guys in the group is a good friend but also an awful cheat and we always agreed that we wouldn’t go there with him (let alone because he is in a relationship). We went out last night and at some stage the two fecked off together and it was pretty clear why. I know that it’s absolutely none of my business and I have no right to chastise her, but I’m pissed off because I can’t understand why you’d knowingly sleep with a taken person.
Please tell me to keep my mouth shut and to keep my thoughts to myself. I haven’t heard from her yet but I don’t want to be the judgy and bitchy friend.

I think you should save most the judging for your good friend that is a serial cheater!

Tbh for me it depends on the age etc. Does his partner know he’s a cheater? Has he got kids/married?

I would just stay out of it.

Ask where she disappeared to and hope she gives a good reasonable (untrue) reply that you can live with.

Oh I won’t be asking either of them. Yes I’m irritated by him too but more disappointed in her as I kind of expect this sort of carry on from him. We’re all in our 40s.
I’ll stay out of it, just wanted to vent.

I’d be more annoyed with him than her if he is the one who’s cheating. To be honest if they were this obvious it will probably be found out anyway, so just ignore it.