This isn't exactly shocking.

Kris Jenner has been open about her infidelity in the past, but in the upcoming tell-all book Kardashians: An American Drama, the momager's cheating is exposed on a whole different level.

The Kardashian matriarch's mother Mary Jo allegedly began grooming her to be a seductress from a young age.

"The way I knew Kris, she was a good person and then something happened. She changed and we weren't seeing much of each other. She was pursuing something else. I don't want to use a bad term, but I think her mom was pimping her out," a former pal dished to author Jerry Oppenheimer.

A 17-year-old Kris met 28-year-old pro golfer Cesar Sanudo at the Hawaiian Open in 1973, and the two became engaged two years later. That relationship ended when Sanudo came home and found Kris in bed with Robert Kardashian. She left Sanudo for Kardashian, but not before allegedly robbing him of $30K in gold!

"My dad had gold bullion, gold coins, and one day, a couple of weeks after Kris left, my dad went to look for them and they were gone. Sometime later he said he had run into Kris' mom and he saw that she was wearing a bracelet that had three gold coins on it, and my dad thought they were from his collection," Sanudo's daughter revealed.

Karma reared it's ugly head when the then mother-of-four was caught having sex with her trainer Todd Waterman at the home of her husband's best friend Larry Kraines. Robert found out about the affair and ended their marriage.

Who new Kris Jenner was such a man eater?!