Ok.
Well, having four children isn’t remarkable. It’s more than average but not out of the ordinary.
Being 26 isn’t remarkable either.
So it was clearly not about the number of children or the age of the OP but the two together that was supposed to be worthy of questioning. In other words the - are they all from the same father, do you claim benefits, don’t you care about a career, were the questions the OP wanted, and got.