AceShowbiz -

Things have apparently gotten so bad between Kendall Jenner and Kylie Jenner. According to Radar Online, Kendall is "livid" over Kylie's debut in Vogue Magazine 's January 2016 issue. "Instead of being happy for Kylie, or proud of her, Kendall is actually quite p*ssed off about this," a source tells the site.

The site goes on to claim that although Kendall has been featured on the cover of Vogue Japan, France and Brazil, she wanted to be featured in the American edition for the new year. The source claims, "She could not believe that Kylie was chosen for the U.S. version of Vogue while she was given the foreign one."

"To make matters worse, the fact that she shot the spread with Bella Hadid has Kendall even more upset," the source continues, "Kendall legitimately thinks that Kylie is trying to steal her friends and her life and she cannot stand it anymore."

Kendall and Kylie's older sister Kim Kardashian recently denied that her sisters were feuding in the Sunday, December 20 episode of "Keeping Up with the Kardashians". While Kendall was seen blasting Kylie for bringing Tyga to their vacation, Kim told E! Newsthat the siblings' relationship "is not rocky."

But according to the Radar Online source, Kim was lying. "Kim knows that Kendall and Kylie's growing animosity towards each other is worse now more than ever, but Kris pushed her to say that nothing's wrong," the source explained, "It's ironic that Kim was the one to do this PR move, considering that one thing that both Kendall and Kylie have in common is that they cannot stand her!"