But as RadarOnline.com readers know, it's all "staged" for the ratings, as sources say.
A preview video for this Sunday's KUWTK shows Kim and Khloe sitting down to talk about their ongoing battle with Kourtney.
Khloe tells Kim she had a horrible phone call with Kourtney, which had occurred off camera.
Khloe claimed Kourt was "talking sh*t. She was like, 'Me and Kendall were talking about you.
"She goes, 'You're really scared about how your life is gonna turn out.' She thinks I'm scared, that's why I'm 'acting out,' because I don't want to let my old life go. What?" Khloe sighed.
The baby mama of basketball player Tristan Thompson was pregnant when the episode was filmed, so Kourt was supposedly throwing shade about the situation.
Kim responded to Khloe about their sister, "She's so off," and added that Kourt was being a "freak."
Season 15 of KUWTK has already shown the two yelling at Kourtney about how she's abandoned the family.
And on the episode which will air on E! this Sunday, Kim and Khloe also decide to call little sister Kendall Jenner to whine about Kourtney.
"The fact that you even hang out with Kourtney, you're such a f-cking freak," Kim joked to Kendall. "I question your morals. I question your humanity."
Jenner replied, "What? Why? Kourt is my best friend right now."
But the model also claimed that Kourtney might not even spend Christmas with her sisters.
Khloe and Kim compared Kourt to their brother Rob in a "cry for attention."
"Every time we talk about her I get more upset," Khloe tells Kim about Kourtney.
Kim concurred, saying, "She drives me so crazy, I just don't even know what to do."
As Radar has previously reported, however, the Kardashians are in a desperate fight for ratings.
A source said that the sisters' alleged battle is all to get viewers!
"Their fight this season is so overly dramatic, and they all know it," a Kardashian confidante told Radar.
"There is no doubt that the three of them aren’t as close as they used to be, but they all knew they needed something big to start off the season."
So far, Kourtney has been seen screaming, "I’m not here not be mistreated by my f**king b**ch family" on season 15.
KUWTK keeps pouring on the drama, but as Radar has learned, it might all be for naught. The season premiere of Discovery Channel’s hit reality show Alaskan Bush People destroyed the competition on the Sunday, August 19 season premiere — and had more than three times as many viewers than KUWTK!
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