Kardashian began dating Bendjima in 2016 after years of on-again-off-again romance with Disick, with whom she shares three children, Mason, 8, Penelope, 6, and Reign, 3.
"Near the end of the relationship, the two weren't getting along and the age difference ultimately played a part", the source added. Bendjima was photographed in Mexico on Monday looking mighty comfortable with another woman.
Khloe, 34, echoed the shade, commenting: "Alexa play "heard it all before" by Sunshine Anderson".
"They really want me to be the bad guy f- your Hollywood bulls- (can't have fun with your friends no more) ...where are my 12 other friendssss?"
The cherry on top of the comment was a Pinnochio emoji.
In case you forgot, Kourtney slammed her family as "gross" and "disgusting" after sister Kim called her the "least exciting to look at".
The Kardashian sisters may be after each other on Keeping Up With the Kardashians this season, but when push comes to shove, they always have each other's back. In the now-deleted comment, he wrote, "that's what you need to show to get likes?"
"Once again you guys failed", he wrote Tuesday on Instagram Stories.
He also shared another message in which he told fans he was "not attached to this "life" so criticism would not bring him down. "Only one opinion matter [sic]. Have a wonderful day", read Bendjima's post.