The former star of Girls of the Playboy Mansion Holly Madison is probably not going to get an invite back to Hugh Hefner's famed estate after she dished the dirty on her five-year relationship with the Playboy boss, HollywoodLife.com reported. In her new memoir Down the Rabbit Hole: Curious Adventures and Cautionary Tales of a Former Playboy Bunny, the 35-year-old blonde claimed that Hefner liked to watch her "fake f***" other women while he masturbated. She added the 89-year-old "always finished by himself".According to HollywoodLife.com, she said Hef would watch porn, smoke marijuana and masturbate while his girlfriends, and whoever else was in the room, pretended to have sex. Madison said the first time she had sex with Hefner, there was no kissing and it " was so brief that I can't even recall what it felt like beyond having a heavy body on top of mine".Kendra Wilkinson, 30, who also starred on the show, said Madison's memoir was based on revenge."She wanted Hef's kids, she wanted a piece of Playboy and she wanted to marry Hef for, obviously, his will," Wilkinson told People magazine."That didn't happen. So what do you think's going to happen? Revenge. So we're witnessing some revenge here." ..