Bodog Beat

Kendra Wilkinson is a cheater. (E! Images)

File this story under shocking, but this 23-year-old hottie wasn't totally satisfied boning a crusty old dude on viagra. Crazy, we know. If you've ever wondered whether Hugh Hefner's girlfriends are really forced to live the real, monogamous deal, former girlfriend Kendra Wilkinson has spilled the beans.

Kendra told Us Weekly, "I had to have sex every now and then, so I had to kind of sneak it. Besides the nights we went out, I only saw Hef, like, once a day walking through the halls to his office. There were never solo dates. The most we kind of say to each other is, 'I love you,' 'Love you too,' 'I hope you have a good day,' 'Did you have a good day?' Bridget [Marquardt] told me that she's been faithful all these years, and I was like, 'How the hell can you do that?' I had to have [sex] so I could feel my age, like a healthy human being."

Wilkinson also said that she received a $1,000 per week allowance while at the mansion and also had to let staff members know where she was going at all times.

"I hate putting my hand out, but we couldn't have jobs other than getting appearance fees," she said.

Wilkinson has changed her tune since becoming engaged to Philadelphia Eagles' Hank Baskett: "Now I'm totally against [Hefner's] way of life, with three girlfriends and all of that."