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"Valerie Bertinelli has admitted that she regrets that she &amp;quot;wasn&amp;#039;t there&amp;quot; for her One Day At A Time co-star Mackenzie Phillips. Phillips appeared on The Oprah Winfrey Show yesterday and claimed that she had an incestuous relationship with her father John, a founding member of the group Mamas And The Papas.  The 49-year-old recovering drug addict was arrested last year at LAX airport on two counts of drug possession. She was scheduled to appear on The Rachel Ray Show for a reunion with castmates from the &amp;#039;70s sitcom.  Winfrey surprised Phillips by bringing on former co-star Bertinelli, who said that she had &amp;quot;no idea&amp;quot; what her television sibling had been though, TV Guide reports. She said: &amp;quot;I had no idea what you&amp;#039;ve been through. I feel regret that I wasn&amp;#039;t there for you as much as I could have been.  &amp;quot;I was so wrapped up in my own life and my own, you know, drama of being in my life, because I&amp;#039;ve dealt with substance abuse. And so I wasn&amp;#039;t paying attention to my sister, and I feel bad for that.&amp;quot; In 2008, Bertinelli released memoir Losing It: And Gaining My Life Back One Pound At A Time, which chronicled her marriage to musician Eddie Van Halen, drug abuse and struggles with her weight. "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.digitalspy.com/showbiz/news/a179035/bertinelli-i-wasnt-there-for-phillips/>