It depends how old your existing children are? If they are of secondary school age I honestly wouldn’t do it.
I am only 33 but had my children in my early and mid-twenties. I have only in the last couple of years got my career fully back on track and I’m due to get married early next year.
We toyed with the idea of having a baby together as I’ve never had the lovely family, raising a baby together experience and I’m a bit sad that I never will. Luckily my DP has 2 kids of his own so I don’t feel I’m denying him anything.
BUT even if we split and I met someone with no children I don’t think I could put myself through the potential split of a family again. Having been burnt before I would not want to have a child I could potentially end up only having part custody over, with a different father, and also halting my career again for maternity leave etc.
I also couldn’t imagine having to use most of my salary to pay for nursery fees again when that money could be put to better use for the children I already have.
I mean no offence to anyone that is an older parent, but the thought of still having to do school runs in my late 40s - early 50s actually makes me feel sick. I’ve done it all in my 20s & 30s, I couldn’t imagine wanting to start again just as things are getting easier.
You’re not depriving him of anything if you say you don’t want anymore children, but equally he isn’t wrong if he says it’s a deal breaker for him.
Just think of how you see your life in 10 years... is it with a child (or children) still of primary age who are still very dependent on you? Or do you see yourself enjoying your grown up kids coming to visit you at weekends from university/their own homes, whilst you have the freedom to holiday when you want, eat out when you want and have more disposable income and an advancing career?
I know which one I’d pick.