Kim Kardashian calls Kourtney a 'fake humanitarian' during heated fight

On Keeping Up With the Kardashians Sunday night, things were getting heated between Kim Kardashian and Kourtney Kardashian.

This isn't the first time Kim and Kourtney have gotten into a major blowup fight. Last season on KUWTK, Kim even told Kourtney she was "the least exciting to look at." However, what started as a seemingly silly disagreement over clothes this time around, turned out to be something deeper.

"Kim and I just got into the biggest fight," Kourtney said over the phone to a friend. "She just was going so crazy. She's sending me the meanest text messages. You would die. She's like, 'You're the biggest ungrateful b***h.' Then I said, 'God, you're such a petty woman." And she's like, 'Is that a joke? I had to intervene when your stylist pulled the nastiest clothes for you for your birthday party.'"

Kourtney told Khloé Kardashian, that the whole argument was "a joke."

Meanwhile, Kim was with her mother Kris Jenner, explaining, "Basically, I got into the biggest fight with Kourtney today because she, just, is such a b***h. Like, on another level. So, I called Kourtney, and Kourtney, like, screamed at me on the phone."

Back with Khloé, Kourtney explained how she texted Kim, saying "You're going to school to become a lawyer and help the world, and these are the kinds of problems you have?" According to Kourtney, Kim replied saying Kourtney was "a miserable human being" and that she didn't understand the issue because she all of a sudden turned into "such a humanitarian," but hasn't "contributed one ounce to the world."

Kim told her mother she thought Kourtney was a "fake humanitarian hoe." Kim said, "I actually do s**t for the world, and you fake it all day long and act, like, 'Oh, there's people dying, Kim.' And what the f*** are you doing about it? So shut the f*** up."Days before Kourtney's big 40th birthday party, the eldest Kardashian sister was feeling super emotional and on edge. So when Kim accused Kourtney of copying her style, Kourtney completely broke down into tears.

"I really don't take it personally," Kourtney told Khloé. "I know it's not something that I'm doing. It's just hurtful. And it's not just that. I just feel overwhelmed with, like, my birthday and everything."

Even though this all happened a few months ago, as the drama unfolded Sunday, wounds were reopened on Twitter. Kim even tweeted that she was getting mad about it all over again and that their group chat was lit.

In the end, the two made up, as they always do. Once Kim realized Kourtney was going through something emotionally, she even decided to extend an olive branch in the form of a vintage Gianni Versace dress, and Kourtney was happy to accept.