Prince William reportedly has taken action to frame his children’s relationship with his stepmother Camilla Parker Bowles. The newly-titled Prince of Whales is adamant that Prince George, 9, Princess Charlotte, 7, and Prince Louis, 4, not refer to Queen Consort Camilla, who married William’s father, King Charles III, in 2005, as “grandmother” or even “step-grandmother,” according to royal biographer Angela Levin’s new book Camilla: From Outcast to Queen Consort.

“William nonetheless has made it clear that Camilla is the wife of his father, but not a step-grandmother to his children, and that Prince George, his sister Princess Charlotte and Prince Louis have two grandfathers, but only one grandmother,” Levin wrote, per InStyle. She continued, “William and Harry were 23 and 20, respectively, when Camilla officially became their stepmother in 2005. She was more of a friendly grown-up they saw occasionally at royal gatherings. She tried to be encouraging rather than influential.”