Confirmed! Levi Johnston's Sister Mercedes Posed Nude for Playboy

USMagazine, Wednesday, July 13, 2011, 10:00am (PDT)

Mercede Johnston is following in her brother's footsteps and taking it all off for the cameras.

Two years after Levi Johnston bared his bum for Playgirl, his 18-year-old sister will be featured in a four-page nude pictorial in Playboy's September issue, a magazine spokesperson confirms to Us Weekly. (The magazine will arrive on newsstands August 12).

VIDEO: Bristol Palin tells Us about how Levi proposed

Mercede has often been critical of Bristol Palin, with whom her brother had a son, Tripp, in 2008. In Palin's new memoir, Not Afraid of Life: My Journey So Far, the Dancing With the Stars alum detailed the loss of her virginity to Levi while drunk off wine coolers during a camping trip.

PHOTOS: A look back at Bristol and Levi's romance

"Does anybody really believe a good Christian girl, such as Bristol claims to be, would really lose her virginity in a tent?" Mercede seethed in a July 4 blog post. "I don't think so. Usually girls want their first time to be meaningful and special."

Mercede continued to defend her brother after Palin claimed Levi "stole her virginity" during the camping trip.

VIDEO: Watch Bristol's final performance on DWTS!

"After she made those hurtful and indefensible statements in her book about my brother, I decided no matter how uncomfortable I feel talking about this, it is something which I must do," Mercede wrote. "No one deserves to be accused of such a disgusting and horrendous thing. Especially not my brother who, believe it or not, truly loved Bristol with all of his heart."

Get more Us! Follow us on Twitter, Friend us on Facebook, Subscribe to Us Weekly