Khloe Kardashian Snaps Over Kourtney's Nasty Attitude: 'Why Are You So Bitchy These Days?'

In a sneak peek at Sunday's premiere, Khloe and Kourtney Kardashian are at odds, snipping back and forth at each other in an extremely awkward -- and expletive-filled -- exchange.

Before Kourt even enters the room, Kim Kardashian and Khloe are talking about their sister's "f--king attitude" lately, with Kim admitting that she's "so afraid of her."

When Kourtney does eventually join them for a meeting, she's completely disinterested, stares at her phone in silence and offers up zero help as Kim plans two family events, including a baby shower for Chicago.

"Thanks for being so present," Kim says, after Khloe agrees to give her a hand with the shower.

Instead of anything constructive, Kourtney offers up some nasty criticism of Khloe's home decor. "Who let you choose black covers for your furniture? Disgusting," she said with a dismissive tone. "Usually people get a color that's neutral to your floor."

"That's nice Kourtney, thanks for coming over," Khloe responds. "Thanks for being so lovely."

When Kourt says Khloe is just as critical when she comes to visit, Khlo snaps back, "What is up your ass? Seriously, what the f--k is wrong with you? Why are you so bitch these days?"

The clip ends with a gem of a confessional: "If I wasn't pregnant, I'd probably have f--king drowned you in the pool," Khloe tells the camera.

So, what's going on here? Well, according to a synopsis for the episode, "a fight over the family Christmas card escalates into a major feud between Kourtney, Kim, and Khloé." There could also be some drama with Scott Disick, who apparently "feels guilty for moving on to a new relationship" with Sofia Richie.

"Keeping Up with the Kardashians" premieres Sunday at 9PM on E!