Kendall Jenner and Kylie Jenner might be the ultimate sister duo 95% of the time, but the new episode of Keeping Up With The Kardashians revealed they actually didn't speak for a month following their physical fight.

ICYMI, Kendall and Kylie got into a bit of a barney on a recent episode of KUWTK (though it's unclear when it was filmed), which ended with 25-year-old Kendall saying she'd never speak to her sister ever again.

After arguing about who got to wear what to dinner, things turned even more ugly when Kylie, Kendall and Kris Jenner's partner Corey Gamble got in a car home to go home at the end of a night out, and Kylie refused to drop Kendall home. Eventually, Kylie and Corey dropped Kendall off at the side of the road and Kim sent a member of security to go and get her.

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why kendall and kylie jenner didn't talk for a month

'I will never speak to Kylie ever again,' Kendall told Kourtney, Khloe, Kim and Kris once they'd picked her up. 'She smacked me, not hard, she like, smacked me or something, so I came back at her and smacked her in the face and then she took her heel and put it into my neck. So then I started kicking her back. We got in a full fight.'

True to her word, the latest episode reveals the pair didn't speak for four weeks following their row - the longest the sisters have ever gone. 'Have you talked to Kylie yet?' Kris Jenner, 65, asks Kendall during a virtual group chat with Khloe and Kim.

'Nope,' Kendall replies. 'I've never heard from her, not even a little bit, which is rare.'

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'It's been about a month,' Khloe chimes in, before Kendall explains in the confessional that it's the longest she and Kylie have ever been without talking. 'Kylie and I got into a pretty big fight on our way home from Palm Springs.

'It's been a really long time and I haven't heard from her. It's really weird, we haven't gone this long without speaking.'

Khloe then advised Kendall to offer her younger sister an olive branch. 'You guys both need to know that life is short and we need to take our ego and pride out of this and just say, "Kylie, I'm sorry for my part in the disagreement." And then she should say, "I'm sorry for my part." And then guess what? We can move on.'

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A later clip showed Kylie and Kendall kissing and making up over Facetime, and apologising for the 'misunderstanding' before saying they loved each other.

Ahh, sisters.

why kendall and kylie jenner didn't talk for a month
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Dusty Baxter-Wright
Entertainment and Lifestyle Director

Dusty Baxter-Wright is an award-winning journalist and the Entertainment and Lifestyle Director at Cosmopolitan, having previously worked at Sugarscape. She was named one of PPA’s 30 Under 30 for her work covering pop culture, careers, interiors and travel, and oversees the site’s Entertainment and Lifestyle strategy across print, digital and video. As a journalist for the best part of a decade, she has interviewed everyone from Louis Theroux and Channing Tatum to Margot Robbie and Ncuti Gatwa, while she has also spoken on Times Radio and BBC Radio. You can find her on Twitter and Instagram here.