​After last week's ​turmoil between sisters Kim and ​Kourtney Kardashian, they're on the same side of an argument this time around. ​Kim implied that Kourtney's ex-boyfriend, Younes Bendjima, is a liar, after he denied doing anything wrong during his recent getaway to Mexico.

Bendjima claimed he was just "having fun with [his] friends" in Mexico, taking to his Instagram story saying, “once again you guys failed. I’m not attached to this ‘life’ so you can’t touch me...I know who i am where i’m from and where i’m going and that bothers you. only one opinion matter The one of my Lord. Have a wonderful day.”

In typical ​KKW fashion, Kim was quick to respond to Bendjima's claims after he was called out by The Shade Room on Instagram. She replied, “Nice pics from your ‘boys trip.’”

According to Us Weekly, Kim's snappy response was prefaced by her sister, Khloé, throwing Bendjima shade in response to different Shade Room post. 

“They really want me to be the bad guy,” Bendjima wrote on his first Instagram Story, alongside crying laughing emojis. “F—k your Hollywood bullshit (can’t have fun with your friends no more) Where are my 12 others friendssss Nice catch tho.”

Khloé's ironic response, "Alexa play 'heard it all before' by Sunshine Anderson," was called out by several fans because Khloé stayed with her boyfriend, Tristan Thompson, after he cheated on her during her pregnancy.

On Tuesday, Us Weekly confirmed Kourtney and Younes' split, after nearly two years of dating since they met at Paris Fashion Week in 2016. The Us source says it was Kourtney who ended things.

Sass runs thick in the Kardashian blood and it's clear that if you try to hurt or cross one sister, there will always be at least a couple more on the frontline ready to back her up.