Kendall Jenner typically keeps herself far away from all the drama that surrounds her very famous family.
The model is usually content just doing her own thing, walking various runways around the globe and really not stirring up much controversy at all.
But this will all change on Sunday's brand new episode of Keeping Up with the Kardashians.
As previously documented and depicted, Kendall and Kourtney will get into an actual fight on this upcoming installment of the popular E! series.
We know, right? Sounds totally insane, right?!?
What could these two possibly come to blows over?
According to Kendall, it all came down to the way Kourtney acted on a recent trip with Jenner and her friends.
"We went to Mammoth. To be honest, it was kind of a lot for me," Kendall tells Khloe in the clip featured here, adding:
"A lot of the trip, people were picking on me -- and by people, I mean Kourtney most of the time. Whether or not she thought she was joking, I didn't really think it was a joke."
Okay, go on, Kendall...
"You know, Kourtney and I have been getting a bit closer over the past couple years and I love that she hangs out with me and my friends," Kendall went on to say via confessional.
"But, to be honest, I felt like there were just some moments where she was a bit rude and it really started to get to me at a certain point."
Meaning what, exactly?
"I just felt like she was trying to be cool in front of my friends and younger people that are cool ... at my expense," she explained to Khloe.
This doesn't sound like Kourtney, at least not the Kourtney we know, bur Kendall says here that her half-sister snapped at her when Kendall complained about her muddying up her car.
"She was like putting me down to make herself feel higher or cooler," Kendall told Khloe.
And just how did Khloe react to this news/update/explanation?
Whose side did she take in the sister squabble?
After hearing Kendall's complaints, Khloe said she was "so annoyed with Kourtney," adding in her own confessional:
"She is supposed to be the older sister, but it just seems like Kourtney was bullying Kendall the entire time."
Check out the footage here to see more!