The buzz is that Kardashian sisters, Kim, Khloe and Kourtney, are not happy with Harry Styles' and Kendall's relationship. The sisters are apparently worried that Styles will break their little sister's heart.

A source told National Enquirer Magazine, "Kim, Kourtney and Khloe are super worried about their baby sis and keeps on warning her, 'Don't fall in love with Harry, he's going to break your heart'. But it's too late,"

Kendall told them, "I'm already madly in love with Harry."

The latest rumor was that Styles was spotted flirting with an unknown brunette during the Sundance film festival.

A source told E!online.com, "As the night went on, I could see Harry flirting with the brunette. At one point it was just the two of them canoodling in the corner...they were really into each other."

Does this mean Kim and Kourtney's fears regarding Styles' intention toward Kendall are true?

Since his break-up with Taylor Swift, Styles has been linked to slew of women. One of the most talked about women in his life previous to Kendall was Cara Delvengine. Reportedly, owing to Cara's busy schedule things did not work out between the two.

He has been allegedly dating Kendall since November and apparently the couple has grown very fond of each other. Kendall Jenner's mother Kris Jenner has even given the go signal to their relationship as she loves all the headlines the duo is making recently.

The source further added to National Enquirer magazine: "Kris just loves all the publicity about Harry and Kendall, and absolutely flipped about Kendall's idea to feature Harry on several episodes of 'Keeping Up with the Kardashians'. Even though Harry's been reported as saying he won't go on the show, she's still hoping Kendall might somehow sweet talk her beau into doing the show."

There were reports that Styles may even make his debut on "KUWTK" and Kris Jenner wants Styles to quit "One Direction."

According to a source Now (via Ocean Up), "They're (One Directioners) worried that she's (Kris Jenner) is slowly trying to get him to quit the band. Kris is the mastermind behind her daughter's success and financial empire. She has endless contacts and a lot of clout, two things that could really help Harry launch his solo career."

Reportedly, the management of One Direction is not happy with the way Kris Jenner is poking her nose into Styles' career.

Do you think Kris Jenner's meddling in Styles' carrer will make him ditch Kendall Jenner? Is this the reason he was allegedly flirting with a girl at Sundance? Let us know your thoughts.