Rob Kardashian and Blac Chyna just can't seem to make it work.

On Sunday's episode of KUWTK, sisters Kim and Khloé inquired about Rob's engagement to the former model.

MORE: Kris Jenner Gushes Over Her New Granddaughter Dream Kardashian!

After Rob admitted he wasn't living with Chy, Kim proceeded to ask if they still planned to walk down the aisle — and his answer is pretty shocking.

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"I mean I don't expect to get no ring back if we weren't, I'm not trippin'," he told Kim.

The couple's constant bickering is frequently documented on their reality show, Rob & Chyna — remember when they fought over french fries? The news of a possible halt in wedding plans comes shortly after Chy gave birth to baby girl Dream.