Jenny (Human Nature TV character)
Jenny was one of the cleaning staff at a boys school in England in 1913. She became good friends with Martha Jones, who became a maid to look after the 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 the Mother so that she could possess Jenny's body. (DW: Human Nature)
When 'Mother of Mine' Posessed Jenny's body she was became essentially dead, as her mind was presumably destroyed.
Her body containing mother of mine's conciousness was disposed of into the event horizon of a galaxy at an unknown point of time by the doctor.
It may have been shredded into atoms by the singularity or transported to another universe as Omega was.