Responses
I think she might have accepted it if he at least talked about it and let her know instead of talking back all high and mighty when she asked. I think it's his reaction and the lies who made her snap.
And don't forget it WASN'T really the past, he was two timing her too since he was still with our mc while being with her. He cheated on both of them, I don't know if she realized that yet though.

The exboyfriend will lose everything. A better relationship to his ex, his wife, the trust in everyone ╮( ̄▽ ̄)╭ KARMA BITCH!
Don't be an asshole and let them live. But I can't really understand the wife. His relationship with a man was in the PAST! Deal with it gurl.