Kendall Jenner Says Kylie and Tyga's PDA Is 'Annoying' During Family Vacation in St. Barts

The 20-year-old model expresses her concerns in a new teaser clip from Sunday's episode.

Kendall Jenner just wants some alone time with her sister!

In a sneak peek from a new of episode of Keeping Up With the Kardashians, the 20-year-old model continues to be annoyed with Kylie Jenner for packing on the PDA with her rapper boyfriend, Tyga, during their family trip to St. Barts.

WATCH: Kendall Jenner Slams Sister Kylie in New 'KUWTK' Clip

In the video, Kylie, 18, and Tyga, 26, are seen cuddling up close in the front of a boat, while Kendall looks on and expresses her feelings to their older sister, Khloe Kardashian.

"It's so annoying, because I literally waited for Kylie for 30 minutes to do the fly thing," she explains about missing out on going fly diving with her sister. "She just took too long with T. And we couldn't do it, which is so annoying."

The clip then jumps to a solo interview with Kendall, where she reveals she's still disappointed with the way things have been going on the family trip.

WATCH: Kylie & Kendall Jenner Show Off Toned Bodies in St. Barts

"It's kind of annoying because I was really looking forward to being with Kylie on this trip," she says. "And it's not even about Tyga, it's more that just I know she'll kinda be taken away from me."

In another episode of the reality TV series that aired earlier this month, Kendall told Caitlyn Jenner that Kylie "doesn't have her priorities straight" after she left their outing to a race track within minutes of arriving.

"You could have taken this time to be with your family," Kendall says to Kylie in another scene, clearly irritated with Tyga being on the trip. "I was really looking forward to this trip to hang out with you," she later adds.

Kylie, on the other hand, was ecstatic about having her beau join her famous family on their getaway.

WATCH: See Kylie Jenner Lose Her Mind Over Tyga Crashing Her Family Vacation

"I am so excited to see Tyga," Kylie says in another episode. "I love having T around. I feel like he just keeps me sane, and he always does everything that I want to do and we love going on adventures."

As we patientely await for the new episode to air Sunday at 9 p.m. ET/PT on E!, hear more of the Kylie and Kendall drama in the video below.