The Disappearance of Lynette Dawson

Nearly six weeks after Lynette Dawson disappeared, on February 18th, 1982, her husband Chris finally reported her missing. He stuck to his story. There was nothing to be worried about. She had left to join a religious group after they had argued about her spending addiction. It was sad, but these things happen. He would get over it. Don't worry.
Yet the notion that Lynette would abandon her two children seems impossible to swallow. She was a loving mom, and nothing suggested that she would give up her daughters for anything. She had said nothing about joining some cult to her mom and sister, with whom she was close. Never did she get back in touch with her children or make any enquiries about their well-being.
What really happened to Lynette Dawson?