According to the Daily Express, the unnamed man has alleged at the High Court that his 67-year-old mother breached her "duty of care" by failing to stop the systematic beatings, up to 10 times a day, when he was a child.
He said his father was "a bully and he instilled fear" but his mother should have protected him, by obtaining a court order against her husband or even divorcing him.
Instead, the court was told that she would tell her husband about their children's misbehaviour, giving a reason to beat him.
The son told the High Court that he was beaten up to 10 times a day from the ages of five to 19 with a belt, cane, electrical lead or a wooden hairbrush. At 19 he left home but the beatings had ruined his life, he said.
He said of his mother, "I always felt she could have done more and I have mixed feelings towards her. I would not say my mother had done her best to protect me. I always felt she could have done more. She wasn't a tormentor like my father was, continually looking for excuses to assault me. For the best part of it, she was herself fairly harmless."
However, he said that he was unable to complete his education because of phobic anxiety and had difficulty venturing outside the house, forming relationships or holding down employment.
His lawyer, Justin Levinson, told the court, "His mother had a duty to protect him from the foreseeable risk of physical injury. She shouldn't have allowed her husband to remain in the same house and beat his children. She should have obtained an injunction or divorced him." The hearing continues.