Kardashian, 27, appears on the May issue of Cosmopolitan, where she defends her mother for addressing her weight gain on national TV.
"Listen, my mom believes in us more than we believe in ourselves. But she is also our manager and trying to protect our brand," Kardashian tells the magazine. "She'll say, 'Oh, you're a little too fat right now.' If she were just my manager, I'd have fired her right then. You can't talk to me like that."
In May 2011, Jenner explained her on-air weight scrutiny, telling Us Weekly: "Although I think Khloe looks amazing just the way she is, I feel everyone needs a little motivation from time to time. I think I was just way too critical in the moment. I feel terrible that I made her feel bad about herself! I would never intentionally hurt her feelings."
Kardashian, a 5-foot-10 QuickTrim spokeswoman, doesn't mind being seen as the "curvy" sister, thanks to her NBA player hubby Lamar Odom, 32.
"Lamar tells me he loves my body and I'm beautiful, multiple times a day," she told Us in 2011. "I've never had that before: someone saying, 'Without makeup, without clothes, you're stunning.' He loves my body and loves that womanly shape."