Adrian Mole Doreen Slater, whom Adrian privately refers to as "Stick Insect". Brett makes a reappearance in the later books as a successful yet unpleasant businessman who loses his fortune during the credit crunch. Doreen is killed off in "Prostrate Years". Pauline temporarily marries her younger lodger Martin Muffet, who eventually leaves her for Adrian's girlfriend Bianca Dartington, giving Adrian and his mother a shared heartbreak. Later, George and Pauline effect a partner swap with Ivan and Tania Braithwaite (parents of Pandora), only to reunite after Ivan's untimely death. Adrian's half-sister, Rosie Germaine Mole (after feminist Germaine Greer), grows up to be
Adrian Mole rebellious and street-smart, in contrast to Adrian. Despite opposing personalities, the siblings enjoy a close relationship, and Adrian often feels that she is the only family member who understands him. She also relies on him on occasion; when she becomes pregnant as a teenager, Adrian supports her decision to have an abortion. Although the identity of Rosie's father is originally uncertain, in "The Prostrate Years" Mr Lucas, now wealthy, gets back in touch with Rosie and demands a DNA test on "The Jeremy Kyle Show". Adrian tries to talk his mother and Rosie out of informing George or appearing on