John McCain may have recently come to former running mate Sarah Palin's defense, but in an interview with Playboy magazine, his daughter Meghan revealed still-simmering tensions between the McCain and Palin clans.

Meghan McCain told Playboy that a memoir written by Bristol Palin, Sarah's daughter known for her teen pregnancy, was a "total lie."

Bristol, she said, avoided her at the White House Correspondent's Dinner and "totally took off" when she saw Meghan across the room, lest Bristol be confronted about jabs she made about the McCain women in a recent memoir.

In her book "Not Afraid of Life" Bristol dings Meghan and mother Cindy McCain for having "so much Louis Vuitton luggage, so many cell phones, and so many constant helpers to do hair and makeup." Bristol also writes of Meghan that after their first meeting she had the "sneaking suspicion that I might need to watch my back."

"I saw her across the room," Meghan, a conservative commenter on MSNBC, told Playboy of seeing Bristol at the correspondents' dinner. "That girl biffed it fast, totally took off. All that stuff she wrote was a total lie. I have, like, one Louis Vuitton purse. She's just young and confused and was thrust into all this. The media aren't kind to her. But once someone signs up for 'Dancing with the Stars,' it's hard to sympathize."

Meghan, who was interviewed for the magazine but did not pose nude, also revealed to Playboy that she "almost overdosed on Xanax," the anti-anxiety drug the day before the 2008 election.

"I gained a lot of weight," she said of her time on the campaign trail, "because of Starbucks and Snickers."

Meghan, who has departed from her father in her strong support of same-sex marriage, dismissed any rumors that she was gay. Using an obscene rhyme, she said was "strictly" straight, adding: "I can't help it. I love sex and I love men."