Oh gee. So he cheated on his wife with you too. No wonder his kids don’t like you. Well then you already knew he was a liar then.

By the way every cheater tells stories how he is unhappy in his marriage and how he never has sex. That’s a typical story. All a lie. He is pretty much serial cheater. Did he cheat on you too because you never had sex and he was unhappy? You know that’s not why he had two girlfriends at once. He likely told that story to whoever he cheated on you with.

Cheaters don’t need reasons to cheat and lie. That’s just who they are. Be glad you never married him so you don’t have to deal with divorce process. I recommend therapy to get to the roots of this attraction.

PS I’d check for STDs too. If he sleeps around he possibly not using protection. Some STDs don’t show up right away. HIV could lay there for over 10 years and one wouldn’t know.