"F---ing fabulous," Kris says sarcastically to herself after her daughters skip out on her

Surprise, surprise – there’s more drama brewing between the Keeping Up with the Kardashians ladies.

Khloé Kardashian and mom Kris Jenner have been feuding for the last few episodes, and it looks like the tension is sticking. In a sneak peek at Sunday’s episode, Khloé teams up with sister Kendall Jenner to ignore their mom during a meal on the famous family’s vacation to St. Barths.

“Oh we got it down to eight, pretty good,” says Khloé, 31. “To talk me out of –” she continues, before Kris, 60, interrupts her to finish the sentence.

“Screaming at me and going nuts?” Kris says.

“Do you want to go ride on the things while they’re getting ready?” Kendall, 20, says to Khloé, cutting off her mom.

“Oh my God,” Kris groans as she realizes the two are completely ignoring her.

As Kendall and Khloé begin to gather up their belongings and leave the table, Kris remains seated, shaking her head.

“No it’s okay, I’m good. No need to worry about me!” she says sarcastically to the empty table. “F—ing fabulous.”

Khloé and Kendall, meanwhile, run off to ride around town on ATVs.

“We all came to St. Barths, I think, to get away from all of our problems and just kind of have a release of life and enjoy and step away,” Khloé says during an on-camera interview. “And I cannot hear the moaning and the groaning and the complaining. Thank God Kendall is here, and thank God I have a partner in crime!”

And that’s not the episode’s only clash between the ladies – another preview clip shows tension brewing between Kendall and sister Kylie Jenner, 18, after Kylie decides to bow out of a family excursion at the race track with dad Caitlyn Jenner right after Kendall arrives.

“She doesn’t have her priorities straight,” an irritated Kendall says to Caitlyn, 66.

“I actually can’t believe that Kylie is leaving right now just ’cause we never get to spend time with each other. I travel a ton for work and even when I’m home in L.A. I feel like I don’t even really get to see Kylie as often as I’d like to,” Kendall says in an on-camera interview. “To have a moment to spend time with your dad and your sister – I would take it.”

Keeping Up with the Kardashians airs Sundays (9 p.m. ET) on E!