This happened to me but I found out at 2 weeks pp and my baby is 2 months now. I was very angry as he lied to me my whole pregnancy and because of his lies I just messaged his girlfriend directly I sent a nice message and said it’s fine she’s with him but as it’s my first time as a mam I don’t want to share these firsts with a random woman and she totally understood said she wouldn’t meet her till I’m ready! Hopefully she’s a girls girl and will understand and you can set your boundaries! I think the fear comes with them playing happy families with your baby xx
I believe there’s a document you can put in place with the courts that legally binds an agreement with the father and I’ve heard that some people have included “baby not meeting new partners (of mother and father) until at least X amount of time in the relationship” You could look into this I think it’s called a parental agreement but don’t quote me on it x
I think you need to figure what's actually going on, maybe have a conversation in place that you both agree nobody can see the child until there a year into the relationship and know it's serious. Just expressing your concerns about not wanting people coming in and out her life. Otherwise, think it's triggered some stuff for you and just get to healing too.