Been with my stbxw 8 years, only married 9 months. I'm almost 100% certain she has been having an affair with her personal trainer. Not sure how long it's been going on. I have a few pieces of evidence that I just came across which pretty much tell me everything I need to know.

She hasn't filed for divorce yet but she's the one that originally wanted this. She blamed me for everything, telling me and all of our friends and family that I was toxic and abusive. She gaslit me until she was out of ideas. It took a huge toll on my mental health. Finding out about the affair makes me pissed that she got away with making me out to be the bad guy.

I want to tell her family about it so they know what kind of monster she really is. He's married with kids. I feel like I should let his wife know about the situation too. Do I tell the other wife? Do I meet with my wife and confront her?

On another note, I'm in my family business and make 3 times what my wife makes. What do I have to lose by blowing it up? I don't think we've been together long enough for her to collect alimony, but could she somehow take retaliation against me or the business? She originally wanted to just dissolve the marriage without going through a full divorce but I guess that could change if I call her out on her shit.

I'm also not sure what my next move should be. Should I talk to my stbxw or his wife first? How do I start the conversation to call her out?

Thanks in advance, everyone. This shit sucks.