In a sneak peek at Sunday's season 12 premiere, Kendall Jenner gets seriously ticked off with her brother Rob Kardashian after she finds out he re-gifted the iPad she bought him for Christmas to his girlfriend Blac Chyna.
In the scene, Kendall is hanging out with her sister Kylie Jenner, who is on the phone with Kim Kardashian West.
"What did he give her?" demands Kendall, 20.
When Kylie, 18, informs her that Rob gifted Chyna with an iPad, Kendall loses it.
"The big one? The massive one? I gave that to him for Christmas!" she says, sounding shocked.
"Did you give him a keyboard or no?" Kylie asks. At which point Kendall confirms that she bought her brother an iPad along with the accompanying keyboard and pen.
"Kim, you're going to die right now. He regifted Kendall's gift," Kylie tells her older sister over the phone.
"I'm so mad! I would have given that to someone else!" Kendall says furiously.
"Rob is dating someone that has kind of had a bad history with my family," she continues in an on-camera interview. "And he fully regifted my gift. On top of that, it's so annoying to find out through social media because his girlfriend posted it – like, there are some things that just aren't cool, and I don't think this is very cool."
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Kendall then decides she's going to ask for the gift back and Kylie urges her sister to call Rob right then and there.
"Yo, can I have my iPad back?" Kendall says once he picks up. "No. Bible – I want my iPad, my pen and my keyboard back."
She then puts her brother on speakerphone, and he can be heard sounding irritated, asking: "What pen?"
"It came with an iPad, a pen and a keyboard, and I want it all back because if you're not going to use it, I have someone who actually really is dying for it," she says while raising her voice. "One, I'm annoyed. Two, I'm actually hurt that you regifted my f---ing gift that I went out of the way to give you."
"That's the first time you've ever given me a gift your entire life!" responds Rob, 29.
"Why are you being so defensive?" Kendall asks.
"You're hilarious," Rob says sarcastically. "Buy it yourself, you moron."
"Send me the link, bro. Send me the link," Kendall says before hanging up in a fury.
"He knows he's wrong. You should just say: 'You know you're in the wrong,'" Kylie tells her sister.
Indeed, Chyna, 27, has feuded with Kardashian's famous family in the past, largely because she was previously engaged to and shares a son with Kylie's current boyfriend, Tyga, 26.
That being said, all parties involved appear to have since buried the hatchet after Kylie and Chyna Snapchatted about being "best friends" last week. Rob, who is now engaged to Chyna, has also been spending time with his sisters and was spotted hitting up a fruit truck with Kendall and Kylie while they were hanging out over the weekend.
Keeping Up with the Kardashians season 12 premieres Sunday (9 p.m. ET) on E!