In a new teaser of "Kourtney and Khloe Take The Hamptons," aside from the fight of Kim Kardashian and mom Kris Jenner over an apartment in New York, Kim Kardashian West also calls her sister fat.

In a sneak peek of Sunday's reality show "Kourtney & Khloe Take the Hamptons" episode, the reality star also admits she wants a smaller booty. Then she suddenly suggests her sister Khloe Kardashian could afford to lose a couple pounds as Khloe is fat.

"Khloe's ass is so big...like she's got to like lose a couple lbs," Mrs. West's told Scott Disick and Kourtney Kardashian. Disick exclaims,

"What? You guys are famous for big butts! You guys lose your butts, we may all lose our money!"

Then Kim K. replied, "I don't care. I want a flat ass now."

Aside from the "butt" concern, the girls Kim and Kourtney also express their concern over their single mother Kris Jenner.

"I think she needs a little action." Kourtney said after calling Kris "irritable" since filing for divorce from Bruce Jenner in September.

"I think a fun, casual summer romance may be the perfect thing to get my mom's mood back." Kourtney said.

Meanwhile, Kris and Mrs. West have a feud over an apartment in New York. It seemed both of them are scheming to each other.

The conversation of mom and daughter goes:

"Kim, did you put in an offer on an apartment in New York?" Kris asked her daughter after talking someone on her phone.

Kim replied, " Yeah, the one that I love."

After hearing that, both women's tone sounds a bit mad.