What would Kirstie advise her hypothetical daughter (which, at 42, we all know she is too old and wizened to have) do? Kirstie would say: "Darling, do you know what? Don't go to university. Start work straight after school, stay at home, save up your deposit - I'll help you, let's get you into a flat. And then we can find you a nice boyfriend and you can have a baby by the time you're 27."
Of course, hetero Kirstie Jr would have to find a willing boyfriend who wanted to have a child with her at 27 - but this is all hypothetical. But why has this been leapt upon as such dreadful advice?
The approved window in which to have a baby is very small from 27 to, oh say, 28?
In the Guardian Kirstie's remarks were quickly written up as patronising, getting Helen Fraser, chief executive of the Girls' Day School Trust to comment on the advice, which she called a: "throwback to the 1950s... "University education is incredibly important for girls...we would be extremely disappointed if girls left school at 16 and tried to find a flat funded by their mother and waited for the nice boyfriend to turn up.
"People deserve to aspire to having both a fulfilling career and a happy family life. That's what men take for granted and girls who leave university at 22 should not be told by anybody that they have to decide between a career or a relationship and children."
This is true. However Helen Fraser's opinion is as clear as Kirstie's. Just as there is concern trolling over women who either want to establish themselves professionally before babies or simply haven't met someone they want to share genes with, the women who decides university isn't for her and motherhood beckons has similarly unsolicited questions over regret, combined with dismissal and intellectual snobbery.
The young mother with no qualifications runs the risk of ageism if and when she enters the jobs market or higher education, just as the 'career women' risks infertility. And all because we insist on either/or.
The fertility window in which to have a baby is pretty wide, from menarche to menopause, wider than many women are led to think as reported on here. The approved window in which to have a baby is very small from 27 to, oh say, 28? Mother Nature might not be a feminist but society's a bitch.