I'm going to watch it later, can always switch off if I find it too much.
There was a woman (few years ago) married to one of those; he'd abused her two children (not his) when they were but she didn't know until he was done for doing it to someone else.
He was out on bail pending sentencing and she stayed with him to protect him from vigilantes. She felt that was the right thing to do. Her children wouldn't have anything to do with her.
She couldn't grasp the fact that she too had been abused by him. She had been abused as a child and was only about twenty, with two little kids, when she got with him and eventually married him. He was a lot older.
It was awful. I wonder if she is still with him, he must be out of prison by now.
So I am interested to see the programme.