"I just don't think Kourtney realizes how bomb she is right now," sister Kendall Jenner says in the clip

By Lindsay Kimble
Updated November 16, 2015 09:55 AM

Season 11 of Keeping Up With the Kardashians started with a bang on Sunday night, and if the teaser trailer is any indication, there’s more drama to come.

In a new promo shared by E!, single Kourtney Kardashian strips down to shoot some naked photos for photographer Brian Bowen Smith’s Metallic Life series.

While Kourtney, 36, poses seductively for the shoot (which appeared in Vanity Fair), sister Kendall Jenner talks up her breakover body.

“I just don’t think Kourtney realizes how bomb she is right now,” says Kendall, 20, of the eldest Kardashian sibling, who split from longtime love Scott Disick in July. (He’s now in rehab, and a source told PEOPLE last week that Kourtney is “staring to trust him more, but there are no talks of getting back together yet.”)

The mom of three (Mason, 5, Penelope, 3, and Reign, 11 months) even gets hit on while the family dines out during their lavish summer vacation to St. Barths – a trip that brings Kendall and Kylie Jenner‘s squabbles to a head.

After Kylie, 18, decides to invite boyfriend Tyga on the family vacay, Kendall complains that she was “really looking forward to this trip to hang out with you.”

Later, when Caitlyn Jenner asks Kendall what the “deal” is with Kylie, Kendall responds, “She doesn’t have her priorities straight and I tell everyone that.”

The tiff comes after the super close sisters argued over a dress in the premiere.

Plus, momager Kris Jenner‘s relationship with younger man Corey Gamble seems to be heating up, with the road manager saying she’ll always be his “baby.”

“Mom is not denying that Corey’s her boyfriend now,” Khloé Kardashian says in the clip.

Kourtney continued her sexy streak Saturday at the 2015 Baby2Baby Gala in Culver City, California, stunning in a vanilla pantsuit and little else.

Enjoying the night on the town, the reality star opted to forgo a shirt underneath her soft suit jacket while mingling with guest of honor Kerry Washington and stars like Gwen Stefani.

With reporting by REAGAN ALEXANDER