Mackenzie Phillips: I Was Raped by Papa John

Mackenzie Phillips, the trouble-plagued eldest daughter of the late Mamas & the Papas frontman John Phillips, says in an interview with Oprah Winfrey, airing tomorrow, that she was a victim of rape at the hands of her famous father.

Phillips says in her new memoir, High on Arrival (which she discussed with the daytime queen), that she confronted John, who died in March 2001, about their sordid past, saying, “We have to talk about when you raped me.”

To which John replied, according to his daughter, “You mean when we made love?”

Ugh.

“Interviewed One Day at a Time’s Mackenzie Phillips,” Winfrey wrote on Twitter this afternoon. Thought I’d heard it all…beyond shocking! We’re airing it Wednesday.”

Phillips, 49, is John’s daughter with his first wife, Susan Adams. Bijou and Chynna Phillips, who also have different moms, are her half-sisters.