Inside Kim Kardashian's Shocking Prenup

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Keeping up with the accounting!

Kim Kardashian is safeguarding her savings before saying "I do" to fiance Kris Humphries. "Her mom, Kris Jenner, drew up the contracts," a source tells Us Weekly.

"Kim's Beverly Hills home and all of her assets are protected," the insider says of Kardashian, 30, who Forbes estimates made $12 million in 2010.

"Additionally, she keeps anything she earns during the marriage."

The groom-to-be, 26 (who makes $3.2 million a year as a New Jersey Nets forward), seems cool with the contract's terms.

"He does not receive anything if the marriage fails," continues the source. (The pair dated for 6 months before Humphries proposed with a 20.5 carat ring.) "He agreed to that. He's not worried."