The sexual abuse of children by adults is now a well-recognised issue. But the sexual abuse of children by other children is far more taboo.
Yet it's more common than you'd think. Almost a third of all child sexual abuse is carried out by other children.
Dr Eileen Vizard, a child psychiatrist with the NSPCC's Young Abusers Project and Denise Moltry from Barnardos Taith Project join Jenni to look at this difficult subject.