My heart says maybe but my head says no to one more child?

I have one child. We love him to bits and I love being a mom.

We’re at the point where we are considering having another child. My husband has said before I got pregnant with my son that he’ll likely only want one child. I was open to that, although (as many other people) always kinda imagined having two children.

My husband has 3 siblings and I have one. He’s close with one of this brothers, but not with his other two. He has a really rough childhood (abuse and neglect by his mom, dad in and out of his life) and doesn’t really see the value in family support - since he’s never really experienced it. He says he’s closer to his friends than he is to his family, and doesn’t see having additional children as being support for our son down the line.

I love my brother and we are pretty close. Sometimes I worry we’d be doing my son a disservice by giving him a smaller (but potentially stronger) immediate family by not having more children.

I daydream of being pregnant again, I love looking at old photos of my son and seeing how much he’s grown. I imagine him being an amazing big brother and them playing and having fun growing up.

Logically I can’t get past the “pros” of only having one child… financially, emotional capacity, more sleep (our son has never been a great sleeper), not having to worry about being fair, being able to focus resources on only one child, still having time for my career and marriage….

Just wondering what other peoples thoughts are objectively on my situation. My husband is leaning towards being one and done, and of course we both need to be on board.

Thanks all!