July 08, 2015 06:32 PM

Kendall Jenner was busy runway hopping in Paris, but now that she’s stateside again, she’s back to her everyday L.A. activities, like working out with her sister Khloé Kardashian. And Khloé was so excited to see Kendall, that she actually licked her.

Courtesy Khloé Kardashian

“I missed her so much and those abs were irresistible!!!! 😻😻😻😻 #SisterSister” she captioned the above photo on Instagram, showing the duo clad in their workout gear at celebrity trainer Gunnar Peterson’s gym. For her part, Kendall looked like she was laughing so hard that she had to cover her mouth.

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And Khloé’s revealing photos didn’t stop there. The 31-year-old reality star also shared a snap of her famous backside in a pair of skintight NYDJ jeans.

Kendall also shared some sexy snaps on her social feeds. The 19-year-old supermodel’s first ads for Calvin Klein Underwear debuted Tuesday. She poses topless in one, showing off her fit frame. In other shots, you can see those famous “irresistible” abs.

Courtesy Calvin Klein

“It was super fun,” Kendall told WWD of shooting the label’s new intimates collection. “Every girl loves posing in her underwear. It’s always fun to do that.”

In the sexy series of black-and-white images, Jenner joins superstar model Joan Smalls (who appeared in a CK campaign back in 2012), Edita Vilkeviciute (who has worked with the line since 2009) and brand newbie Isabeli Fontana in the campaign. The tagline? “The original sexy.”

What do you think of Khloé’s silly snap? How about Kendall’s sexy new ads? Sound off!

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–Brittany Talarico

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