What would you choose/lose?

Would you continue to have sex with someone who had your cousin first and also one of your other cousin’s mom?

Me and this guy have known each other since childhood. I was introduced to him by a male cousin in my teens but didnt give him the time of day. Since then he talked to one of my cousins and nothing happened. But later he slept with one of my other cousins (he says about 5 times)…and then later he slept with another one of my cousin’s mom (he says 4 times). He said that they both heard that he had a big you know what…

We continue to be cool. He didnt hide that fact that he talked to one of my cousins about 14 years ago but was never sexually involved…and the fact that one of my cousins mom he screwed 10years ago. But what he didnt tell me was that he slept with my close cousin until after we had sex. He said I wouldnt have went through with it. Whats more akward is that they live in a small town and she said she heard we were talking but called him later that night about it. She didnt tell me she talked to him, he did. Should I leave him alone or continue this.

Knowing this, should I continue to talk and sleep with a guy that I know has had a sexual past with members of my family?