Feuds within the Kardashian clan are certainly nothing new.
In fact, it often seems that the world's most famous set of sisters can never get along for more than a few weeks at a time.
Obviously, in many cases, the beefs are staged for the sake of reality TV drama.
But sometimes, the animosity is real, and the bad blood results in a sort of Kard-clan civil war in which sister is pitted against sister.
And according to Radar Online, the latest rivalry between Kim and Kourtney is the real deal.
Not only that, this isn't based on some petty slight, but is instead the result of long-simmering tension that stretches back yeeeeears!
But according to a new report from Radar, it's only in recent months that the situation has escalated to the point that Kim and Kourt “can’t be in the same room together.”
The problem, it seems is that Kim's ego has gotten out of control.
(We guess that'll happen when you're the most famous woman in the world, you work to secure presidential pardons for drug offenders serving life sentences, and you're working to become a lawyer in your free time.)
“Kourtney has hated Kim for a couple of years now," says the source.
"She thinks she’s vapid and mean, and Kourtney has much better things to do with her time than kiss up to Kim.”
And apparently, the feeling is somewhat mutual:
“Kim, meanwhile, thinks Kourt should kiss up to her given she would be a nobody without her," the insider claims.
As Keeping Up With the Kardashians viewers know, the ongoing feud between Kim and Kourtney has been caught on camera on several occasions.
“Kim and I just got into the biggest fight. She was just going so crazy. She’s sending me the meanest text messages, you would die,”
“She’s like, ‘You’re the biggest ungrateful b***h.’ So, then I said, ‘God! You’re such a petty woman,’”
The peak, of course, came when Kim screamed at Kourtney and accused her of lacking passion and work ethic.
Highlights included Kim accusing Kourt of being a “fake humanitarian hoe,” which is obviously one of the greatest reality TV insults of all time.
“I actually do s--t for the world and you f--king fake it all day long,” she said.
“And act like, ‘Oh! There’s people dying, Kim.’ And what the f--k are you doing about it? So, shut the f--k up.”
“Their egos have clashed big time and when the cameras aren’t on, they don’t speak, “ the source says.
“There are hints of their feud of course but the reality is they genuinely can’t stand each other.”
Apparently, the sisters are refusing to film together these days, which means we may not be seeing much of their beef on KUWTK.
Jeez, y'all don't like each other much these days, but don't punish us, the fans of televised pettiness.