Royal author defends claim Sarah Ferguson enjoyed 'friends with benefits' relationship with Sean Combs Biographer Andrew Lownie has insisted allegations involving the ex-Duchess of York and the disgraced music mogul are "fully sourced" after sources said to be close to Sarah Ferguson branded the cl 10 May 2026 Royal author Andrew Lownie has defended his allegation Sarah Ferguson had a secret and years-long "friends with benefits" relationship with disgraced rapper Sean 'Diddy' Combs.