Advice for sleeping with married man

So I’ve been seeing this guy for the last 8 months and got very serious completely fallen for him.

Turns out he’s married which I was aware of but not the circumstances.

They were meant to be getting a divorce but now I’ve found out she never knew about me and they’re working things out and he’s telling me it’s for the kids he doesn’t want to be with her and he wants to be with me yada yada.

I want to know if you were in my shoes would you tell the wife or just leave the situation and not be a homewrecker ?

So stuck on what to do.

Also how do you suggest I tell her if yes because she won’t accept any of us on socials and I’m worried she’ll show him the messages that it came from me. I rlly don’t want him to know it came from me because this guy is a family friend and I have to see him out in social settings.