Citing "irreconcilable differences" in her filing, Kardashian, 31, will not seek an annulment.
Swapping vows with Humphries, 26, in a $10 million Montecito, Calif., ceremony August 20, Kardashian quickly reached her breaking point.
One sticking point for the couple? Currently unemployed due to the NBA lockout, Humphries has been partying up a storm on his wife's dime -- while she juggles her successful E! reality shows and business ventures.
"Kim and Kris are not getting along at all," a source tells the new issue of Us Weekly. "Kris is not drinking the Kardashian Kool-Aid, and it's causing problems."
Days before Kardashian's 31st birthday, the newlyweds "had it out!" says a family friend. "She told him he needs to do something productive. The work ethic in that family really means something. He needs to get off his ass, like, yesterday."
"On some levels," says the friend, "she feels like she made a mistake."
In the video above, take a look back at the ups and downs of Kardashian and Humphries' relationship, and for more on what drove them apart, pick up the new issue of Us Weekly, out now.