Am I being selfish?

Currently 33 weeks pregnant around 12 weeks pregnant my now x partner cheated and tried to lie for over a week before finally telling the truth, I was going to forgive because I already have two kids to a previous relationship and I didn't want to have three kids in total and be single but when I wasn't home he had video sex with someone else in my bed and I couldn't stand it and just broke it off for months he has been begging crying annoying me for more chances but at the same time has had around 4 more women either flirting with, making out with or had done sexual things with each time I've asked him to just be honest he lies and called me delusional crazy ect until he finally confesses the truth.. it's now gotten for the point I'm getting close to having my third child but his first but I really can't stand the idea of him being in the room is this a selfish act for me to tell him he can't come while she is born? Sorry for any errors in my story it's late and I'm absolutely buggered 😂