Despite her anger over her father's infidelity, Minerva insists on meeting her half-sisters and insists after his death that they get the opportunity to have an education. Why do you think she does so?

Minerva's treatment of her half-sisters is a direct result of her sense of fairness. No matter that she is disgusted by her father's actions, Minerva does realize that it isn't the fault of the children. She insists that they get an education so they will not face the same hardships of their mother later on in life.