@Nana75 I'm sorry to hear that. I know its painful because something similar happened to me, except they did meet. Im glad for you that they didn't, except he might still wish they did? Him describing the first sexual experience with her must have been a hard thing for you to read. I hope you're able to recover and forgive. Not easy I know.
About 11 years ago I became seriously depressed because he denied me a baby and my biological clock was ticking. Before we married he had been agreeable about having a baby, but he'd changed. All his family and friends were in on it telling me what a bad idea it was. I was devastated. So, a deep depression and he was more than useless, no compassion or care at all - in fact he stayed away from me more than ever and refused to contact the GP.
He ended up moving out and I became so depressed that I lined up pills to end my life. I thought no one would ever love me and I really felt hopeless. At my lowest point, my husband did not show any care and my Mother was bullying me and getting other relatives to bully me accusing me of making it all up. I would have ended it all, except I realised it would be my kids that would find the body- and I couldn't do that to them.
After that I fought for myself. I limited contact with "DM" and other toxic sources. I did what I wanted to, enjoyed hobbies. Just stopped listening to the nastiness and accepted I wasn't going to get any emotional support or a baby. After several months of being single but staying friends with my husband, I took him back.
I think possibly before, he might have compared me with his ex girlfriend in many ways, from things he'd said that made me feel rubbish. By then, he had visited his ex girlfriend and all fantasies he might have had of their relationship had been extinguished. He claimed to me that she had put an advertisement in the local paper wanting to find him... but I have never been able to find evidence of that. Anyway, I felt satisfied that he had explored that and had decided I was the better option, after all.
It's rubbish isn't it. So here we are.