The incredibly cringe moment went down when Giuliana Rancic asked Kourtney what designer she was wearing on the red carpet.
"I didn’t plan this—Naeem Khan?, Kourtney begins, "Is that how you say it?" before Kim goes and cuts her off by legit leaning in front of her sister to say, "All that matters is that we’re wearing KKW Diamonds! That’s all that—we’re all wearing that."
The ~super~ tense moment ended with an even more passive aggressive exchange (if that's even possible) with Kim telling her older sister: "I was saving you since you didn’t know who you were wearing."
Kourt then dryly replied, "No, it’s Naeem Khan, I just didn’t know how to pronounce it," to which Kim gave the most simple yet savage "Oh" we've ever heard.
The moment comes after months of speculation that the sisters are in the middle of a pretty hectic feud, with Kourt announcing to Entertainment Tonight last week that she is quitting Keeping Up With The Kardashian's.
"I just decided to spend more time as a mom and put more of my energy there," Kourt told ET.
"But I’m not saying goodbye. But I think you’ll have to see more of it on the new season, season 18. It isn’t airing yet, but it’s being filmed. Currently, in this room."
None of us are surprised that Kourt is leaving next season, and I guess we'll just have to wait for season 18 to find out if there is any truth to these feud rumours.