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 the show, but they do so; the test proves that Mr Lucas is Rosie's father. As Rosie's relationship with her parents breaks down, she moves in with Mr Lucas and starts calling him "Dad" and herself "Rosie Lucas". Pauline also raises the possibility of Adrian's real father being a poetry-writing maggot farmer she dated before she married George, but Adrian decides not investigate. He thanks his father after learning that he raised him single-handedly during the first year of his life when Pauline was suffering from postpartum depression.