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Kylie & Kendall's Rivalry Explodes: If They Weren't Sisters, They Wouldn't Be Friends

March 25 2019, Updated 7:38 p.m. ET

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Kylie and Kendall Jenner have taken their sibling rivalry to a whole new level, RadarOnline.com has exclusively learned. In fact, the two mean girls can’t even get through the day without dissing each other.

“They fight over friendships, boyfriends, their dad and who’s more successful,” an insider told RadarOnline.com, adding that Kendall, 22, definitely has some career envy going on. “She doesn’t like that her little sis is so rich off of makeup and gets more attention.”

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The tension between the two only heated up after Kendall was spotted on a double date with step-sister Khloe Kardashian and her two-timing boyfriend, Tristan Thompson.

According to sources, Kylie, 20, can’t forgive cheating Thompson for betraying Khloe just days before she gave birth to their daughter, True.

But when it comes to their own love lives, Kylie throws her strong relationship with Travis Scott, and their baby girl Stormi, right in Kendall’s face.

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“Kylie loves to show Kendall how popular she is and what a great boyfriend and life she has.”

Kendall, on the other hand, just wants Kylie to leave her alone.

“Kendall gets mad when Kylie tries to steal her friends from her and raids her closet of her designer clothes,” the source confessed. “When they were little, their parents had to buy two of everything – they were that jealous.”

“If they weren’t sisters, they probably wouldn’t even be friends.”

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