Helpful or hurtful? In the June 9 episode of E!'s Keeping Up With the Kardashians, sisters Kim Kardashian and Khloe Kardashian discussed their brother Rob Kardashian's weight gain -- and subsequent stretch marks.
While munching on a salad, pregnant Kim tells Khloe, "So I was getting a massage last night, 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.
"Reverse psychology," Khloe, 28, suggests of trying to help their 26-year-old brother lose weight. "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, says.
"We get him so sick that he's like I could never eat fast food again," Khloe recommends.
"At this point," Kim says, "I'm willing to try anything."
In a February episode of Kourtney & Kim Take Miami, Rob revealed that he gained 40 pounds after going through a rough break up with Rita Ora. He then publicly announced on Twitter he was starting a diet and exercise plan in order to lose the weight. "I still have to lose like 40 to 50 pounds believe it or not," Rob told Us Weekly in May. "Six months I should be there."
Watch the video above and tell Us: Do you think Kim and Khloe are being helpful or hurtful?
Keeping Up With the Kardashians airs Sunday, June 9, at 9 p.m. EST on E!
This article originally appeared on Usmagazine.com: Kim Kardashian, Khloe Kardashian Criticize Rob Kardashian's Stretch Marks, Weight Gain