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  REUTERS/Danny Moloshok (UNITED STATES - Tags: ENTERTAINMENT)
  Kendall (2nd L) and Kylie Jenner (2nd R) pose with their sisters Khloe Kardashian (L), Kim Kardashian (C) and Kourtney Kardashian at the Teen Choice Awards in Los Angeles August 7, 2011.

The Kardashian's are in danger of being exposed in a tell-all book, written by their former nanny, about their lives before the family was famous.

Pam Behan, the author of the book, was also the family's personal assistant and cook for a number of years. She also helped take care of two of Bruce Jenner's sons, Brody and Brandon.

Despite a good relationship with Bruce, Kim, and Kourtney, she states in the book that the relationship with matriarch Kris was very "love/hate" and that Bruce's two sons were "extremely spoiled and disrespectful," according to TMZ.

Behan also describes a time she almost lost her job due to slapping Brandon once, the gossip site reported.

However, she is grateful to Bruce for helping her fight a DUI charge in the past.

TMZ said, "intimate details" will be revealed about the sisters, but as of right now she has to find a book deal.

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This is not the first time the Kardashian's will be portrayed in a book. Just a month ago, Kris wrote a tell-all book about the family and even admitted to having an affair.

In the book, the 56-year-old wrote, "His name was Ryan, and he was a producer." She says her ex-husband Robert Kardashian “had been the only man in my life since I was 18...I don't know why I was having a mid-life crisis at 30, but I was.”

Her affair eventually led to a divorce.

Last month, Kris appeared on Jay Leno’s "The Tonight Show" and said: “When you’re very young you do a lot of stupid things.”

Adding, “It's probably the biggest regret of my life that I ended up having an affair.”

"[I was] probably just really naive and stupid and restless and didn't realize that marriage has its ups and downs."

After divorcing Robert, Kris went on to marry Bruce Jenner. They have been together for 20 years. "Someone once told me that it's like a roller-coaster, just ride it out," she said to Leno. "But I wasn't really old enough to hear those words."

There is no word as yet of a book deal for Pam Behan.