Rob Kardashian Cries on 'Keeping Up With the Kardashians,' Go-Karts With Rihanna (VIDEO AND PHOTOS)
Rob's breakdown escalated throughout the hour-long episode, after a series of arguments with his big sister, Kim, whom Rob felt was negatively impacting his career.
"Kim is literally the most selfish person here," he said, at one point, in a heated fight with Kim. "All she cares about is herself."
More on Rob's tears, and his frolic with Rihanna, below...
During the session, Rob finally opened up, admitting he was unhappy with the way he was treated in the family business.
"My anger, a lot of it stems from the working environment," he explained to Dr. Nicki J. Monti, "Because they all put this cloud on me like I'm a loser. ... When there's a business opportunity, all my mom cares about is the three girls."
Shortly after, Rob left the room in tears.
Check out the emotional moment, above, then be sure to see how it all wraps up on next Sunday's episode.
Over the weekend, the former Dancing With the Stars competitor was also spotted riding go-karts with singer Rihanna in Burbank, Calif. The duo reportedly went out clubbing later that night in Hollywood. Check out photos from their day together, below.