UPDATE: Chynna Phillips On Mackenzie & Papa John Phillips Affair

Former child star Mackenzie Phillips had promised to expose a family secret in an exclusive interview on Oprah but what she had to say was shocking and bombastic. Mackenzie claims she was raped at the age of 19 by her late father, John Phillips, the frontman of Mamas & Papas.

The 49 year-old told when she confronted her father about it, saying, “We have to talk about when you raped me,” he responded, “You mean when we made love?”

This shocking revelation is on the book “High On Arrival”, which comes out today (September 23). Mackenzie wrote, “On the eve of my wedding, my father showed up, determined to stop it. I had tons of pills, and Dad had tons of everything too. Eventually I passed out on Dad’s bed. My father was not a man with boundaries. He was full of love, and he was sick with drugs. I woke up that night from a blackout to find myself having sex with my own father.”

Mackenzie is the daughter of John Phillips with his first wife Susan Adams and she has two half-sisters, Bijou and Chynna, from different mothers. John Phillips died on March 18, 2001 in Los Angeles of heart failure at the age of 65.

Mackenzie Phillips On Oprah Video Sneak Peek

John Phillips & Mackenzie Phillips Pictures