Kim and Khloe Kardashian Call Kourtney a 'Freak' -- Worry She's Becoming the 'New Rob'

In a preview clip for Sunday's "Keeping Up with the Kardashians," Kim and Khloe have a pow-wow to discuss their ongoing feud with their older sister. Khloe recalls a nasty phone call she had with Kourtney, where Khloe claims the mom of three was "talking shit."

"She was like, 'Me and Kendall were talking about you,'" Khloe says. "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?"

"She's so off," Kim says in response, adding that Kourtney is being a "freak."

The sisters both agree that the whole Kourtney situation is "absurd" and call up Kendall to see what's really going on with her.

Kim first asks Kendall -- via FaceTime -- how much "shit" she was talking on a "scale from 1 to 10."

"We weren't talking that much shit," Kendall responds innocently.

"The fact that you even hang out with Kourtney, you're such a f--king freak," Kim jokes. "I question your morals. I question your humanity."

"What? Why? Kourt is my best friend right now," Kendall says defensively.

As if Khloe and Kim aren't mad enough with Kourtney already, Kendall drops the bomb that Kourtney might not be a home for the holidays.

"She told me she's going out of town with the kids for the holidays," Kendall informs the stunned sisters. "I thought that was weird, but I tried to convince her out of it a little bit."

The KKW beauty founder tries to wrap her head around this entire situation and asks Kendall whether she thinks this is a "cry for help" from Kourtney and asks if maybe this "cry for attention" could have her turning into their brother Rob -- who has distanced himself from the family in recent years.

"Okay, that is crossing the line," Kendall says in response.

Khloe responds that she will be "sad" if Kourtney doesn't come home for Christmas.

"I just think, given everything that's gone on, the last thing we need is separation like this," she adds in a confessional. "The divide is gonna get worse and worse the more time that we just ignore what's really going on."

"Every time we talk about her I get more upset," Khloe tells Kim. "She drives me so crazy, I just don't even know what to do," Kim replies.

"Keeping Up with the Kardashians" airs Sunday nights at 9pm on E!