Step off, sisters. Rob Kardashian defends his proposal to his fiancée, Blac Chyna, to his family in a preview clip of the Sunday, May 1, season 12 premiere of Keeping Up With the Kardashians — and he isn’t afraid to get confrontational.

In the scene, Rob is having a sit-down chat with his older sisters, Kim, Kourtney and Khloé, in what looks to be an intervention of sorts.

The three gals are understandably upset that Rob, 29, popped the question to Chyna, 27, without the Kardashian-Jenner clan’s knowledge, and they want their youngest brother to understand that.

“Listen to the hostility in your voice,” Rob lashes back. “That’s exactly why I don’t say anything. This is the first time I ever proposed to someone in my life, don’t come at me with some bulls--t.”

The Arthur George sock designer looks nonplussed as Kim, 35, Kourtney, 37, and Khloé, 31, stare at him in shock.

Earlier this week, Rob made peace with the women in his life after several weeks of relative radio silence — most recently with Khloé, whom he has always been closest with.

“Rooooobbbbbbbbbbb,” the Kocktails With Khloé host captioned a Snapchat of the brother-sister pair holding hands.

As Us Weekly previously reported, Khloé took Rob’s engagement particularly hard given their bond.

A source told Us that she felt “majorly betrayed by Rob after she always stuck up for him” and felt that his relationship with Chyna was a “major blow to the family.”

Now, however, the family is welcoming Chyna into their folds especially as they continue to see Rob’s progress.

“Rob’s rehabilitation continues to astound the family,” an insider told Us. “They really believe that it’s all Chyna who is responsible for bringing him back.”

Watch the heated confrontation in the clip above. The season 12 premiere of Keeping Up With the Kardashians will air on E! Sunday, May 1, at 9 p.m. ET.

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