updated 09/20/2011 AT 2:00 PM ET
•originally published 09/20/2011 AT 4:20 PM ET
When Cheryl Burke told Dancing with the Stars viewers without hesitation on Monday night that her partner Rob Kardashian has more dancing “potential” than his sister Kim Kardashian, who competed on season 7 of the show, there were apparently no hard feelings.
“My sister knows it, too,” Rob told PEOPLE backstage after the show. “She expects me to do better than her, and I expect myself to do better than she did.”
Kim – who was eliminated third during her season – joined her brother-in-law Lamar Odom and her sisters Khloé and Kourtney in the audience at Monday’s live taping, where they cheered their younger sibling on from the front row.