Heidi Montag's sex tape partner Karissa Shannon wore a tight red mini dress for a date night with her boyfriend Sam Jones III at BOA steakhouse in LA on Monday.

A girl-on-girl tryst featuring the Playboy Playmate and Heidi is among the sex tape library "The Hills" star's estranged husband is planning to go public with.

Spencer Pratt revealed he is in negotiations to sell the footage of his wife having sex, and TMZ.com reports one extract features Hugh Hefner's ex-girlfriend Karissa.

Karissa has not made an official comment on the sex tape, but apparently she doesn't mind going to dinner at high-profile restaurants where she's photographed by the paparazzi.

Karissa's twin sister Kristina, who posed naked with her in Playboy, hasn't been reached for comment either.





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