KARDASHIANS AT WAR: KIM K's NASTY INSULTS TO KOURTNEY "EVIL HUMAN BEING, F**KING LUNATIC"

Kourtney breaks down in tears over Kim's treatment of her, before the fight goes to a new, nasty level.

The absolutely insane war of words between Kim and Kourtney Kardashian escalates to new heights in yet another preview for Sunday's explosive "Keeping Up with the Kardashians" season premiere.

After arguing over the family's Christmas photo shoot -- which ended with Kim saying her sister is the "least exciting" Kardashian to look at -- Kourt calls Khloe crying, not knowing she's on speakerphone as Kim listens.

"I'm not here to be f--king mistreated by my f--king bitch family," Kourtney says through tears over the phone. "Kim saying I'm the least interesting to look at, who even speaks like that?!"

"Khloe, you don't say things like that. You guys just have really different values to me," she continues. "I chose to be a mother to my three kids, I'm not here looking for another job. I already work enough."

As Kourtney speaks, you can see Kim just itching to explode. Khloe puts the phone on mute so Kourt can't hear Kim scream, "YOU DON'T F--KING DO S--T!" before Kim demands to let her speak to her sister. That's when Kim doubles down, telling Kourtney, "You don't do s--t ... be accommodating to the people that actually do s--t."

SEE VIDEO BELOW:

• Tweet
• Share
• Share
• Share
• Share