Rob was stranded, and when he summoned his relatives to come get him, no one responded. When he got home, he confronted them in a testy manner.
"I had to take a cab home cause the four of you are d***heads, you couldn't come and pick me up," Rob said. "This is really f****d up that all you guys thinking I was lying and didn't come pick me up."
Kris then cited Rob's prankster side as a reason they don't always take him seriously.
"If you needed a ride, I would have come and given you a ride," the Momager said, adding, "You're constantly twisting the truth!"
Rob shot back, "It's not about that, it's that you guys don't take me seriously," to which his mother said, "You're full of s**t most of the time and that's exactly why this is happening to you right now.
"If you really ever do need us … you would tell us the truth!"
The sock designer, who finished second on Dancing with the Stars in 2011, then stormed out of the room, noting how his mother barely pays enough attention to him to tell the difference as to when he's kidding.
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Keeping Up with the Kardashians airs Sundays at on E! on 9/8c.