Keeping Up With The Kardashians (KUWTK) star Kendall Jenner is rumored to have upset her sister Kylie following rumors she is dating Justin Bieber.

"Kendall knows full well that her sister loves Justin. Kylie's been desperate to date him for a long time, so for Kendall to hook up with him is pretty poor form," a source told J14.

"LA is nine hours behind Spain, so it was the middle of the afternoon when Kylie saw Kendall's steamy Instagram pictures with Justin. She tried to pretend that she didn't care, but she was close to tears. It's caused a major split in the family, with everyone taking sides."

Rumors of her dating boyfriend Justin Bieber following her break up with Harry Styles grew following pictures of them getting cozy in an Ibiza nightclub some time ago.

However, Kendall Jenner may to want to end her break up with Harry Styles and continue dating her ex-boyfriend.

"The few times Kendall's seen Hazza since their split have made her all the more desperate," a source told the Daily Star.

"She believes he's 'The One' and has been telling all her friends they are meant to be together."

She was also thought to be dating NBA star Chandler Parsons after they were spotted flirting at STK restaurant in Los Angeles, E! Online reports.

Kendall and Chandler had "immediate chemistry," a source told the site.

"She [Kendall] was laughing, smiling and they seemed to be having great conversation with each other."

She was also rumored to be dating Miles Richie, son of Lionel Richie, following her break up with ex-boyfriend Harry Styles.

"She and Miles sat at a corner table with a crew of friends," an eyewitness reported seeing during a July Fourth outing in Los Angeles, Fashion and Style magazine reports.

"Kylie sat close to Miles and played with his shirt. They definitely have chemistry!"