Jenny (portrayed by Rebekah Staton) was a maid at Farringham School for Boys in the Doctor Who episodes "Human Nature" and "The Family of Blood". She became good friends with Martha Jones, who became a maid to look after the Tenth Doctor, who had gone into hiding as a human. She was always cheerful and screamed when she was excited. Jenny was captured by the Family of Blood and her mind was consumed by Mother of Mine so she could possess Jenny's body, essentially killing her.
With Jenny's body, Mother of Mine joined her Family in hunting down the Doctor and threatening the Farringham School. After they were defeated by the Doctor, Mother of Mine was thrown into the event horizon of a collapsing galaxy, to be shown how horrible it is to live forever. Her husband, son and daughter underwent similar punishments.