The non-CF people never stop their demands.

What I mean by this is that they are not happy if you happen to have just one. They'll then insist that you need a sibling for the one you have.

This is especially if you have a girl and the subculture/society is very boy-centric. I've heard of women who already have multiple kids but are pushed to keep going until they have a son. I have heard of men who not only change their minds bu want multiples ESPECIALLY if they're doing NONE of the actual childcare.

My attitude is NEVER bend the knee to these people from the start. The demand/entitlement/presumption is infinite and unending.