
Just a warning... this is really gross, folks.
Remember John Phillips? The founding 'father' of the 60s group the Mamas and the Papas?
OK. Now, remember his daughter Mackenzie, the actress who starred on the 70s sitcom "One Day At A Time"?
Well, she is leveling unbelievable accusations against him in her new memoir.
Both People Magazine and Oprah Winfrey have explosive new details from Mackenzie's forthcoming book.
Check out the teaser for the Oprah episode below.
Courtesy of People, we know what that "family secret" is: Mackenzie says she had an incestuous sexual relationship with Papa John for several years.
Blech.
We don't know if it's true or not, but it is certainly shocking and it is certainly disgusting.
Other revelations include hooking up with a mega rock star and how her drug use started. Don't worry. Those details are disgusting, too.
"The Mamas and the Papas" used to be our favorite episode of "Behind the Music." We don't think we'll ever be able to sit through it again.