Kim Kardashian’s sisters are concerned about how skinny she looks

Kim Kardashian's sisters are really shocked by how much her body has changed. The KKW Beauty founder attended the first ever If Only Texas hold'em charity poker tournament benefiting City of Hope on Sunday, July 29, with her sisters Khloe Kardashian and Kendall Jenner

The trio were backstage at the event, which took place at The Forum in Inglewood, California, and Kim shared clips of her sisters reacting to her slim figure. The supermodel and the Good American founder couldn't believe how tiny their older sister looked at the event. She showed up wearing tight leather pants and a form-fitting black tank top, which had her sculpted arms and shoulders on full display. 

More from MamásLatinas: Kim Kardashian in 31 photos that show how much she's changed

The mom of three proudly took in the compliments and kept asking her sisters to repeat what they said so she could capture it on video. While Kendall made a comment about Kim not eating, it's unfair to not give Kim the credit she deserves for how great she looks at the moment. 

She has been working out a lot recently and even lifting heavy weights with her trainer, Melissa Alcantara, who has dramatically changed her client's body. The reality TV star's whole physique looks more toned, especially her arms, abs and waist, which look super trim. The Selfish author has been known for her curvy figure for years, but there's no denying that at 37 she looks better than ever.

Kim looked FIERCE at the event!

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Kim's arm muscles look incredible and her waist is almost non-existent. She looked super fit while still maintaining her curves. Khloe, who gave birth to daughter True in April, also looked incredible.

Kim sounded very happy while her sisters called her skinny.

In a clip Kim shared on her Snapchat, her sisters raved about how small she looked. "I'm really concerned. I don't think you're eating, you look so skinny," Kendall said, and compared her to her tiny purse. Kim reacted with joy saying, "What? Thank you!"

Khloe also chimed in and gave her big sis props for her hard work.

Khloe said Kim is the skinniest person she's ever seen, but Kim pointed out that their model sister, Kendall, was also in the room. "That's natural!" Khloe added. "You, this takes work to look like that, and that's amazing."

Kim just loved hearing how skinny she is, but fans weren't too pleased.

Her sister and friend Malika Haqq kept teasing her saying she only eats oxygen and celery–and then Kim revealed she weighs just 119 pounds! Some people on social media took offense to Khloe saying Kim's waist looked "anorexic" and that her arms are pin-thin, saying that they are glorifying eating disorders and body dysmorphia. While we understand why Khloe's comments could offend some people, Kim has been hitting the gym hard and eating healthier to look the way she does–and that's always worth celebrating.