They were the closest of sisters and the best of friends, but when their uncle Edward VIII abdicated the throne, the dynamic between Elizabeth and Margaret was forever altered. Margaret would later have to curtsey to the sister she called "Lillibet"—and bow to her wishes. Most significantly, the Queen informed Margaret that the Church and government would not countenance her marrying a divorcee, forcing Margaret to make an impossible choice. In this dual portrait, the author of Diana: Her True Story examines the impact that these women had on the royal family and the Crown.