I think that's a) fab and b) none of anyone else's business.

I was never absolutely deadset on having kids (thought I'd be a lousy mum) but having had my first one recently I've decided that I'd like about 15. Pity I'm 38 so bit too late for me! But I'm sure some people would be appalled if I was still able to have kids at, say, 45. Too old to run around after them yahdeyahdeyahde, she'll be 70 when they're 25 etc. etc. And if I'd started at 24, other people would have said I was too young, should be concentrating on career etc. etc. So you just have to ignore people.

If your kids bring you joy, then just keep bringing on that joy I reckon.