For weeks on end, there have been rumors that Kendall and Kylie's 2015 relationship is not what it used to be, as the supermodel has seemingly had it up to here with her little sister's diva antics - and a new clip from "Keeping Up with the Kardashians" shows the Jenner girls had quite the brawl ahead of Caitlyn Jenner's ESPY night.

Caitlyn made her red carpet debut as a woman on July 15, when she went to the 2015 ESPYs to receive the Arthur Ashe Courage Award - and her two youngest children, Kendall and Kylie 2015, almost didn't make it there because they were having a massive fight.

According to Hollywood Life, a recently released clip from the upcoming November 15 episode of "KUWTK" revealed how the two sisters had a massive Kendall and Kylie 2015 brawl because of clothes, of all things, as the younger sister refused to lend Kendall a dress for Caitlyn's big night.

As Cosmopolitan reports, Kendall and Kylie's 2015 fight happened as the two were set to leave for their dad's ESPY speech, and the 20 year-old model wanted to borrow a dress from her little sister for the dinner afterwards - but Kylie realized it was happening and she had her assistant ask Kendall for the clothes back and find one of her own dresses instead, which brought the ire of Cara Delevingne's close friend.

"You're just literally the biggest f--king bitch I've ever met," said Kendall to Kylie 2015, E! Online reports, to which the younger sister replied with "touché" just before the Victoria's Secret model packed on the expletives upon running into her sister's dogs and telling them "I'm sorry your mom is such a c--t."

While it's unclear whether this was a one-off situation or the constant state of their relationship, this fight in particular was pretty terrible - you can watch this Kendall and Kylie 2015 fight below!