Do all girls expect to have kids before they are thirty or what?

I made a seemingly innocent remark to a relative about my niece of about 30 - something like 'it would be great for her to marry and have kids.'

Well it was as if I had stepped on a landline - was told to mind my own business and that some people make conscious decisions not to have kids etc

So I dig further and say surely her life will not be complete or fulfilled without kids - anyway that landed me further in the Dudu...

So what is the story out there or is it too sensitive a subject for here as well ?