'Alabama Snake': Did Darlene sexually abuse her sons? HBO documentary makes some disturbing revelations

The HBO documentary 'Alabama Snake' revolves around a ghastly incident from back in 1991, that took place in the town of Scottsboro, Alabama. It was the home of preacher Glenn and his second wife, Darlene Summerford, along with their son Marty. To say the least, it wasn't a happy one.
On October 4, 1991, the ambulance was summoned to their house and the paramedics found Darlene in dire straits, complaining of a snakebite. At first, she was taken to a local hospital. However, that didn't have anti-venom and she had to be taken to a Birmingham medical establishment that did. After she recovered, she pointed fingers at her husband Glenn. She said that he had forced her to put her hand inside the box of snakes that he kept on their property. He had accused her of cheating on him and had forced her at gunpoint to stick her hand in the box, twice. This attack became the talk of the nation and Glenn was charged and arrested with attempted murder. He was found guilty and sentenced to 99 years in prison.
In the documentary, Glenn gets to have his say as well and comes out with some disturbing revelations. He claims that she had indulged in sexual abuse as well: She had sex with two of his young sons, which was confirmed by one son and denied by the other. And then, according to Glenn she 'repented' by going to the snakes in the shed. She put her hand in the box, but there was no swelling or pain of any sorts he said. Later, she left what seemed like a suicide note for her son, Marty, which was read out in court. However, Darlene said that Glenn 'made her' write that note. She said that he had a 'demon' in him, and that's when he tried to kill her. She said that he kept running after her with a gun. Darlene also flatly denied the accusations of child abuse and said that Glenn could lie about anything and everything and was a psycho preacher.
There are two versions of what happened on that night, Darlene and Glenn's. And no witnesses.
'Alabama Snake' dropped on HBO, 9 pm, December 9.