STREAM EXCLUSIVE ORIGINALS

Watch Kim Kardashian Call Rob and Blac Chyna "Petty" in This Super Heated Phone Conversation

Shots fired!

Kim Kardashian is not pleased with her brother Rob. Well, at least in this sneak-peek clip of Sunday's Keeping Up with the Kardashians.

Remember when Blac Chyna and Rob publicly bashed the food Kris Jenner stocked in Rob's closet a few months ago? Well, that didn't sit well with Kim, and she let Rob know that in a heated phone conversation caught on camera for KUWTK.

"Rob look I never get pissed and I'm so for you being happy but whatever Chyna and Kylie [Jenner] and all the drama that they have together, like that's for them to work out. Mom has bent over backwards doing all this stuff," Kim told her brother. "Mom is pissed, when you start publicly bashing my sister and mom, that's not cool. This is just unnecessary, this is not what our family does. Like there's way too much drama, so many haters in the world, we don't need this from our own inside circle."

But Rob didn't back down so easily. "I didn't even know what was going on first of all," Rob told Kim. "And I don't even think it's that serious."

And that's when Kim said it. "Everyone has to just not be blasting people on social media," she said. "You two are a unit now so it looks like you're blasting mom and it's petty as f--k."

Shots fired! Watch the tête-à-tête go down in the video above.

VH1 staffers bring Jenner and Tyga's relationship timeline to life in the following video.