Pam Behan - who used to be the family's nanny and personal assistant before they were famous - has penned a tell-all book describing Bruce Jenner's sons as 'spoiled and disrespectful.'
The memoir will go into detail about her time working for the Kardashian and Jenner family and it seems it could get nasty.
Their secrets revealed: (L-R) Kim, Kourtney, Khloe and Kris may not be too pleased with their former nanny Pam Behan writing a tell-all book
Feeling betrayed: Kim (L) and sister Kourtney pictured here at their annual Christmas Eve party may be particularly upset as they were reportedly 'very fond' of Behan
Apparently, Behan makes it very clear in her revealing book that she wasn't fond of them when she started, admits that she came close to losing her job with the family after she slapped Brandon one day.
'Spoiled and disrespectful': Behan wasn't keen on Bruce Jenner's sons Brody and Brandon pictured here with their step sister Khloe
Behan, who also used to cook for Bruce and Kris, has promised that she will reveal 'intimate details' about Kourtney and Kim, despite the women having been very fond of her.
It will come as a blow to the famous family, who are constantly in the spotlight.
Always in the spotlight: Bruce Jenner (far left) will no doubt be angry with Behan for selling her story after he reportedly helped her escape prosecution after she was charged for driving under the influence
The Kardashian family will no doubt be upset with the news but are more than used to the public knowing a lot about their private lives.
They achieved overnight success when their reality TV show Keeping Up With The Kardashians first premiered in 2007 and last year as a family they earned a combined total of $65 million.
Overnight millionaire: Behan claims she had a 'love/hate' relationship with Kris when she served as her nanny and personal assistant before the family were famous