Mackenzie Phillips Opens Up About Alleged Incestuous Relationship With Her Dad On 'Oprah'

She also details early drug use with her father, late Mamas and Papas singer John Phillips.By Jocelyn Vena Mackenzie Phillips Photo: Harpo Productions Mackenzie Phillips was on "The Oprah Winfrey Show" on Wednesday (September 23) to discuss her new book, "High on Arrival," and she candidly spoke about drug addiction and her alleged decade-long sexual relationship with her dad, late Mamas and the Papas singer John Phillips. "This isn't exactly how I envisioned this going down,...

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