https://en.wikipedia.org/wiki/Sheffield_incest_case >The Sheffield incest case concerns the conviction in November 2008 in Sheffield Crown Court of a 54-year-old English businessman who, undetected over a period of 25 years, committed repeated rapes of his two daughters and fathered seven surviving children with them.
>The man continued the abuse by frequently relocating his family to keep them isolated, keeping them out of school when they had any visible injuries, and threatening them with violence. The children's mother had left some years before due to the violence she endured.
>The sexual abuse began when the girls were eight and ten years old. He would call their names in the middle of the night, and even smear "fake blood" on their doors while they were sleeping. There was threatening behaviour used to enforce it including beatings, and their heads being pushed by the gas fire so they were scorched if they moved away. He threatened to kill both them and their children if they told anyone of the abuse. All the children said he dominated the family. To begin with, the attacks were every day, then frequently every two to three days, with the one daughter babysitting while the other was raped. He would even rape them while they were pregnant.
>His two daughters had nineteen pregnancies between them, including five miscarriages, five terminations and two children dying soon after birth. Seven of their children survived. He was said to have 'taken pleasure' from the harm he was inflicting, and the fathering of the children, despite the difficult pregnancies and deaths. If they took contraceptive pills, he told them to stop it and they felt they had to obey.