'I?m not the one who made the choice to become pregnant, yet she can ask me for maternity leave, maternity pay, days off sick, and time off for scans, often with little notice. The balance is all wrong.'
I think there is a strong whiff of resentment there. I don't see the difference between seeing it as an almighty pita and responding by feeling only sorry for yourself because of the turmoil and financial hiccup it is going to cause in your life and expecting her to not get pregnant while employed. The me, me, me tone of the article suggests to me that she expects an employee to put her own personal life on hold so that KH's career can plough ahead.
She strongly resents the fact that the nanny's pregnancy has thrown a spanner in the works, she resents having to pay maternity and possibly holiday pay: if you don't want to deal with your legal responsibilities when your employees get pregnant, employ only men (and only men who have someone else to deal with childcare for them if they are fathers) or post menopausal women. I don't think that's legal though.