As Chris brazenly moved his teenage lover into the family home, Lyn saw the cracks in her marriage widen. It was crumbling all around her. Unable to believe the worst of her husband, she responded with denial, but to her family and friends Lyn's suffering was clear. And the toll was not just emotional. In this episode, a former babysitter for the Dawsons speaks for the first time about the violence she witnessed in the home.