Honest opinions

So I’m a single mom and I’ve been talking to this guy for a few weeks i really like and it’s going really well so far. He knows I have a kid and is completely supportive of him and me. We’re taking it slow at this point but hope that one day we can be in a serious relationship. Now for the issues he’s recently divorced and has a daughter with his ex wife. They had sex a few weeks ago (before we ever started talking) and now his ex thinks she’s pregnant again. He doesn’t know for sure if it’s his baby but said that if she is pregnant she’ll move back in with him so he can help take care of him and their daughter. But he asked me if I would still want to be with him. I really do like him and I wanna see where this goes but at the same time Ik that if my child’s father was with someone eles while I was pregnant it would hurt me. And the thought of him having another child with his ex while being with me is heartbreaking and I know how pregnancy can bring out a lot of emotions and feelings especially while they are living together. Has anyone been through this before or have any advice