Open to Advice

So i am 33 weeks pregnant with my 4th child.. My kids are by the same guy. We were together for 8yrs and have been separated for a year now. I've been with my partner 9 months now. I messed with my kids father once right when me and my partner first started our relationship. My partner is a beautiful woman whom i am very fond of. My problem is every since baby was conceived she has been by my side every step of the way from financial support to every doctors appt. I have cut all ties with my ex but he feels entitled to be in the hospital. I feel she has every right to be there not him. Help!