Kim Kardashian is reportedly jealous of Kourtney Kardashian's slim and trim frame. Kanye West's wife apparently wants to get back into shape.

The Kardashian sisters are currently on a vacation in Mexico with a group of female friends. A source told Hollywood Life: "Kim [Kardashian] is so happy for Kourtney [Kardashian]. This whole trip was about making her feel good, and it's been a total success. But all the body-shaming Kim's been getting over her bikini pics has been hard."

Kim Kardashian baby
Kim Kardashian and Kourtney Kardashian are currently holidaying in Mexico Reuters

"She's sensitive and the things people have been saying online about her body have been horrible," the insider said.

"Kourtney's getting so many compliments on her body and Kim feels like she's getting nothing but hate. She can't help but feel jealous. She's trying to make a joke out of it, but it hurts. It's making it hard for her to totally relax and enjoy herself," the source continued.

Meanwhile, the 36-year-old has been treating her social media followers with her bikini photos. Adding on, Kim had jokingly accused her hairstylist Jen Atkin of spiking her drink and "fat shaming" her during the holiday. She tweeted: "@jenatkinhair spiked my Oreo shake to try to get me to not eat it because she's fat shaming me"