The Jenner sisters, Kylie and Kendall, who are usually so nice to each other, had a shocking post on their Shots account recently.

Kylie directed the word "whore" towards her 18-year-old sister which many think was overly harsh.

On Friday (July 18), 16-year-old Kylie, through her Shots page, posted a photo of her aspiring model-sister Kendall with the caption, "bein a whore never looked so fun."

In the picture, Kendall is seen wearing a printed top, looking away from the camera. But what's noticeable is how Kendall gestured her middle finger.

What the sisters don't seem to grasp is that neither of them were placed in a good light in this photo. For Kendall, the dirty finger reeks rudeness while Kylie's unconventional term of endearment for her sister seems unbecoming.

Soon after the first post, the youngest member of "Keeping Up With The Kardashians," shared another photo which clearly shows that the sisters weren't fighting after all. They were probably just goofing around and trying to fool their social media followers.

"it's not her middle finger guys. Fooled you," wrote Kylie.

According to HollywoodLife.com, the sisters have referred to each other as "whores" before. Noting the June 22nd episode of their reality show, Kendall and Khloe called their mother, family matriarch, Kris Jenner, a "whore."

"Listen, if you whore yourself out that much and have six kids, you should have repercussions," quoted the site of Khloe who was talking to Kim. Which Kendall agreed with and chimed in: "Yeah, that whore."

According to the Daily Mail UK, who photographed the girls on the same day, the sisters were "marching from a business meeting in LA." Another photo on Kylie's Shots page confirms the meeting as she posts a looking-away selfie with her sister captioned: "waiting like bosses for our next meeting."

The girls have been quite busy with a few hosting gigs, the launch of a new book titled, "Rebels: City of Indra" and Kendall's modeling projects.

The Mail further writes that Kendall is already looking at the next chapter of her modeling career and reports, "Kendall is said to be desperate to make the move from California to New York as she's 'fallen in love' with the city and feels it would benefit her modelling career."

What're your thoughts on the language between the sisters? Is it all right or inappropriate?