Talking to exes

Are you comfortable with your SO talking to people he has sex with or exes? Me and my fiancée are fighting about this. I’m not comfortable with it. And I’ve made it known many times but he keeps talking to them.. and he also meets random girls while he’s working and gives them his number. I just think it’s inappropriate. Like am I not good enough for you that you have to talk to other women.

Btw it’s hard because we just had a kid in November. I’ve only been with him since November 2017. I have two other kids that look at him like a dad figure too, And the whole relationship he’s gotten pics from girls. He’s lied about us being together before. Been inappropriate with other women. Just one lie after the next. Idk if he’s done anything physically. Probably never will. It seemed like he was getting better. But haha jokes always on me.