Rob Kardashian and Blac Chyna had some fun at Kris Jenner's expense on Instagram — but Kim Kardashian wasn't about to let it slide.
Earlier this year, the famous momager stocked the 29-year-old reality star's new pantry with a variety of goodies, and instead of being grateful, he joined his 27-year-old fiancée in making fun of some of the unhealthy food choices in a series of mean-spirited videos.
"You're blasting mom, it's petty as f–k!" Kim told her younger brother over the phone in a preview for next week's episode of KUWTK.
Kris also saw the "disrespectful" videos on social media, and wasn't happy with her son and future daughter-in-law.
"Rob went on his Instagram and was making fun of the food I bought," the 60-year-old grandmother told daughter Kourtney Kardashian in the clip.
Though Rob eventually deleted the videos, this isn't the first time the controversial couple has insulted a member of his famous family. Just last week, Chyna released an emoji of a Kylie Jenner look-alike getting slapped in the face.