The book also details Diana's deep family connections to the royal household: she was born at Park House on the Sandringham Estate, her grandmother Ruth Roche served as a lady-in-waiting, and her brother-in-law Lord Robert Fellowes later worked in the royal household. Diana's sister Sarah briefly dated Prince Charles in the late 1970s and is credited with introducing Diana and Charles in 1977.
Mayer recalls that Diana helped set up Sarah Ferguson with Prince Andrew; Ferguson later married Andrew in 1986. The narrative notes both Diana and Ferguson separated from their royal husbands in 1992 and later divorced. The book summary also references later developments: Diana's death in Paris in 1997, and that King Charles removed Andrew's princely title in October 2025 amid renewed scrutiny of his ties to Jeffrey Epstein — a matter Andrew has denied. Divide & Rule covers the lives of eight royal women, including Diana, Kate Middleton, Meghan Markle, Queen Elizabeth and Queen Camilla.