Decisions

Me and my boyfriend have been dating for almost a year now but we're friends for a while before we started dating. We recently have been having serious baby fever. We're both financially stable to have a child and have family that supports our decision but he has a 3 year old by another woman. She often is bitter and even goes out of her way to try to pull us apart. His 3 year old loves me and we work really well as a family but I'm ready for my own and he's ready for another one too. Although I have been feeling a little concern on whether he is all in as he says he is. He has two female friends one who he dated for 2 years and one who he had sexual relations with. He uses them as guidance to be better man for me but for some reasons I don't trust these ladies. It's hard enough dealing with his child's mother but having to deal with those ladies as well is a lot of stress on me. He said he has no feelings for these ladies but I see other motives in them. I feel instead of talking to the ladies he should talk to me and cut them off. They were in his life before me and one of them is his sisters best friend and her family is also close with his. Would I be wrong if I say I don't like the friendship? Should he stop? Once a baby comes into the mix I won't have a choice so I need advice.