'You're a creepster!' Kim and Khloe Kardashian ogle underage sister Kendall's bikini body... and post the footage online

She's currently six months pregnant with her first child with rapper boyfriend Kanye West.

And Kim Kardashian misses her bikini body so much she's taken to enviously ogling her underage half-sister Kendall Jenner.

'Look at this body': Kim Kardashian enviously ogles her 17-year-old half-sister Kendall Jenner's bikini body in a Keek video posted Sunday

The 32-year-old reality star, who's due in July, posted a bizarre 36-second Keek video titled 'Envy' on Sunday for her 17.6 million followers.

In it, the expecting mini-mogul leers at the 17-year-old model laying facedown on a sun lounger wearing a neon green bandeau and black bikini bottom.

'Look at this body on my little sister Kendall Jenner,' Kim is heard saying.

The privileged teen quickly replied, 'That would be creepy. You're a creepster!'

'I'm so jealous': In it, the expecting mini-mogul leers at the 17-year-old model laying facedown on a sun lounger wearing a neon green bandeau and black bikini bottom

Ewww! The privileged teen wasn't having any of it though quickly replying, 'That would be creepy. You're a creepster!'

Two weeks ago: Despite Kim posting the Keek on Sunday, it was actually filmed on March 29 at their momager Kris Jenner's Calabasas home

The Keeping Up With The Kardashians star then backed up trying to defend herself.

'I'm just saying I'm so jealous of how tall you are. I'm not trying to be creepy,' Kim said.

'Kendall don't worry I won't call you too skinny I know you get offfended. But I get called too fat so I'm just saying...yeah it is kind of creepy. But I'm just jealous and she's a model and she's so tall!'

Khloe, who witnessed the entire exchange then sarcastically interjected: 'Yeah, "so tall" is what you're really jealous about, please. [She's got] a good shape.'