Chynna Phillips’ half-sister Mackenzie told her of the 10-year affair she had with their father in 1997—a claim Chynna believes to be true. “Somebody could have dropped a piano on my head and I probably wouldn't have felt it,” the former Wilson Phillips singer tells Us. “But I knew it was true. I mean, who in their right mind would make such a claim if it wasn't true?” Chynna also confirms that John Phillips did drugs with his daughter.
"After long nights of heroin use, she's claiming that she once woke up and that my father was on top of her having sex with her. Was he actually raping her? I don't know. Do I believe that they had an incestuous relationship and that it went on for 10 years? Yes."