In a new clip teasing the upcoming episode, Kim and Khloe spy on Kourtney as she goes to a random person's house, thinking she is there to meet up with a new love interest. However, Kourtney gets incredibly pissed with her sisters because of the violation of privacy. She calls them "so disrespectful".
"If I have boundaries, respect them. Just because you love to show every single thing..." Kourtney says before Khloe interrupts with, "I don't like to...that's our job."
Things start to get incredibly heated, after Kim tells a piece to camera about Kourtney's unwillingness to share becoming a huge burden on her and Khloe.
"Our job is being open and honest and sharing a lot of ourselves, and it just seems for the past few years now, Kourtney hasn't really been open about her personal life on camera. So all of the days that Kourtney isn't filming, Khloé and I are picking up the slack and having to share more. Cause if we're not sharing our lives, then what is the show?" Kim says.
Khloe snaps at Kourtney, saying, "you don't give anything, you coast. You think it's fair that you just coast through life?...I would rather share never a thing."
This clip comes after it was reported that the KKW Beauty founder has been cutting Kourtney "out of the loop for months".
An insider close to the family recently told Radar Online that Kourtney didn't leave the show because she wanted to, but because Kim forced her out.
"Kourt is accusing Kim of forcing her off the show by belittling and cutting her out of the loop for months if not years now," the friend revealed. "She’s convinced this all started because Kim got jealous that she was losing her divine right to be next in line to her mom, and bit by bit she’s used her influence to undermine Kourtney at every turn."
It all adds to the rumour that the sister's fight when the cameras are off too, apparently unable to "be in the same room as each other".
"Kourtney has hated Kim for a couple of years now. She thinks she’s vapid and mean," an insider told Radar Online in October. "Their egos have clashed big time and when the cameras aren’t on, they don’t speak. There are hints of their feud, of course, but the reality is they genuinely can’t stand each other.
"Kourtney has much better things to do with her time thank kiss up to Kim," the source continued, adding Kim believes Kourtney "would be nobody without her".
In a recent interview on The Real, the sisters were asked about why they are constantly bickering.
"It's up and down a lot," Kourtney said, before the reporter asked why Khloe and Kim were giving her dirty looks. "Because they gang up on me all day," she said angrily.
Kim added: "Welcome to my life. That's what you did to me my whole life until two years ago."
The beginning of the end for the sisters seemed to be when they teamed up to throw a joint birthday party for their daughter's Penelope Disick and North West.
Kourtney had a very big issue with all the junk food at the Candyland themed party, which Kim found to be ridiculous.
"She has this vision of no sugar or no disgusting chemicals in candy. It’s like a completely sugar-free, gluten-free, party-free, fun-free zone because Kourtney has decided that it just doesn’t make sense," Kim said to the camera at the time.
"My brand is not unhealthy,” Kourtney argued. Kim replied: "This is about a kids’ party. This is not about your brand....Then why does your car have leather seats? Why are you wearing plastic glasses?"
"I just don’t understand why Kim isn’t trying to compromise at all and she doesn’t feel guilty about giving not only her kids and my kids, but all these kids coming to the party so much junk and candy. It’s such a dated vibe to be like that," Kourtney concluded.