updated 07/21/2014 AT 1:00 PM ET
•originally published 07/21/2014 AT 3:10 PM ET
“We’ve all been here to offer him help and he won’t take it, so I don’t have sympathy,” Kim, 33, said during breakfast one day on the vacation.
She went on to tell the cameras, “I think I’m just more of the tough-love kind of person.” As opposed to Khloé’s coddling, “My personality is like, ‘All right, you complain, you don’t like it, get up and do something about it.’ ”
But it may not that be that easy. “Rob has deeper issues than just weight,” Khloé, 30, said during the episode, citing how hard he took her split from Lamar Odom.
“Rob works out in beast mode,” Peterson told PEOPLE last month. “I know he can do this.”