second baby but no relationship

hey ladies I just want to get your opinion don't chop my head off this is hypothetical. so what if you and your child's father who are not in a relationship together but have a great co-parenting relationship decided maybe you wanted to have a second baby. Now the issue is you didn't get along in a relationship but outside of a relationship you guys are like cool get along very well hang out with your kid and everything. so wanting to have a second baby has been on his mind and your mind but is that realistic not being in a relationship because who wants to be pregnant all by themselves and then when the baby comes here you are stuck with two kids Monday through Wednesday and then he has them Thursday through Sunday that's not realistic is it?