Kim and Khloe Kardashian Make Fun Of Rob’s Weight Gain And Brainstorm How To Help Him Lose 40 Pounds

Kim and Khloe Kardashian talked about their brother Rob Kardashian's weight gain on the June 9 episode of "Keeping Up With the Kardashians." The sisters brainstormed ways they could get Rob to lose the 40 pounds he says he has gained since his breakup with Rita Ora - and they weren't concerned with being sensitive about it.

"Reverse psychology," Khloe, 28, suggests on the episode. "We need to psyche him out . . . Maybe let Rob binge out a little."

"If we put him in a room and just give him burgers, fries and pizza," Kim, 32, chips in.

"We get him so sick that he's like I could never eat fast food again," Khloe says.

"At this point, I'm willing to try anything," Khloe says.

Those words can't be easy to hear. All the while, the sisters munched on salads while discussing Rob's body.

"So I was getting a massage last night," Kim tells Khloe, "and the girl told me if you scratch yourself that's how you get stretch marks because your skin gets really itchy. And Rob has them. Maybe for the fact that he flakes on me all the time," she jokes.

In February, Rob revealed that he gained 40 pounds after a tough break up with Rita Ora. He announced on Twitter that he was starting a diet and work-out plan to lose the weight.

"Six months I should be there," he told Us Weekly.

Meanwhile, Kim has not been free of criticism about her weight. The media has frequently commented on her image and fashion choices since her pregnancy, even comparing her to a killer whale when she wore a black and white dress. Today, Kim ranted on her Twitter about the paparazzi and how they tried to "threaten" her life.