I've always believed that CW capitalized on their hatred of Shanann by telling them of his phony plan to divorce her. Of course they were delighted to hear that he was leaving his pregnant wife and little girls for his mistress. He knew they would back him up whatever story he came up with to explain their disappearance when he planned to murder his family which helped make him think he could get away with it, IMO. The Watts aren't going to make their family look any better or help get CW out of prison by claiming his first confession was the truth and bashing his victims. The Watts continue to add to the Rzuceks suffering by encouraging the conspiracy wackos.