AITAH for blowing the cover on my friends adulterous relationship?

My “friend” 25F has been seeing a married man (30M) for a few months now. And I don’t just mean messing around here and there, I mean actively dating. They go on dates, he buys her gifts, they go away for the weekend- the whole nine. He’s married with two kids. The youngest is only a few months old.

I’m disgusted by her behavior to say the least and refuse to even entertain it when she talks about it. She genuinely doesn’t think she’s doing anything wrong. Not an ounce of remorse.

I had been contemplating our friendship for some time now but this sealed the deal and confirmed she’s not someone I wanna be involved with anymore. I kept it civil at work for obvious reasons but outside of that I didn’t speak to her much.

She recently got another job so now I can finally cut all ties with her with her for good. The other day the wife’s profile popped up in my suggested on Facebook. I’m planning to message her and her know everything that’s been going on with her husband and my now ex friend.

For those wondering why I didn’t do it sooner- I had no idea who she was so I couldn’t even try finding her. I barely knew who he was. And I had so much going on at the time that her soap opera was the least of my worries. But the time to act seems perfect now given that she can’t make my life hell at work and I actually know who the wife is.

At the end of the day I know they both deserve to have their covers blown and be exposed for their deplorable actions, but I can’t help but feel guilty about the fact that I’m about to turn this poor woman’s life upside down when she finds out. She deserves to know obviously, I just hate that it has to come from me. I’ve never delivered news this heavy to anyone.