An inside peek at what really goes on inside the Playboy Mansion, starring Hugh Hefner's then three main girlfriends Holly Madison, Bridget Marquardt and Kendra Wilkinson.An inside peek at what really goes on inside the Playboy Mansion, starring Hugh Hefner's then three main girlfriends Holly Madison, Bridget Marquardt and Kendra Wilkinson.An inside peek at what really goes on inside the Playboy Mansion, starring Hugh Hefner's then three main girlfriends Holly Madison, Bridget Marquardt and Kendra Wilkinson.