He cheated and now have 2 babies on the way

So I’ve been with this guy for a little over 6 years (since I was 19) we had a rocky start in the relationship and throughout the relationship we both were dealing with childhood trauma (mine was I didn’t trust men for multiple reason but him I tried trusting and attached to him) he had women issues seeing his mom cheat and a lot of hurt from being mistreated as a child. Currently I’m 14 wks pregnant and have another child from him (1yr old) and found out he cheated. A woman reached out to me and told me she was pregnant from him as well once he started ignoring her. It hurt me so bad to know he would go that far. She called we talked and originally she was telling me she was getting an abortion and wanted him to pay for it. Him and I ended up breaking up but I didn’t want to give up that easy. I tried to stay and see if we could work through it but the girl has reached out now weeks later saying she’s keeping her baby and he needs to support both of us. We talked on the phone and she switched and said she wanted nothing to do with him and didn’t want him in the child life at all. He’s begging me not to leave him but I think this is really a dealbreaker for me. I know now it’s a little easier to say I’ll stay but on down the line once the child is here, I know I’ll have a change of heart. I keep telling him that’s a situation I never wanted to be in because I’m already hurting so bad and I don’t think I can accept the child and if that’s the case I don’t need to accept him. He begged her to get an abortion but that’s her maternal right to keep her child. She still likes him and wants him and I can tell so who knows how this will turn out.