... if you don't / can't?
Say, for instance, you split up mid 40s so (chances are) by the time you've met someone else, you probably won't have kids.
But your ex (same age as you) meets someone, say, 10 years younger and goes on to have more kids...
Especially relevant if you wanted more kids while together.
Half hypothetical and half, well... not hypothetical.
Would be interested in your views.