Lisa Rinna acted shocked after seeing Erika Jayne's racy music video on Tuesday's Real Housewives of Beverly Hills, but why? As Eileen Davidson pointed out during the show, Rinna has been featured in Playboy magazine, and shouldn't be at all surprised by Jayne's sexy clip.

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Although Rinna seemed taken aback by the video onscreen, she admitted last night on Twitter that she shouldn't have been at all judgmental towards her newest co-star.

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Throughout the years, Rinna has posed for a series of photos for Playboy, including two magazine covers, one in Sept. 1998, and another in May 2009.

While shooting the cover for Playboy's Sept. 1998 issue, Rinna was expecting, but that didn't stop her from posing nude, which she did again years later.

For more Lisa Rinna, tune into The Real Housewives of Beverly Hills season six, airing on Tuesdays at 9 p.m. on Bravo.

Tags: Lisa Rinna Bravo Reality TV The Real Housewives of Beverly Hills