It's all in good family fun, but it's still pretty darn hilarious.
After Kim Kardashian, 33, posted a sexy slow motion modeling video of her flipping her hair while stepping out of a pool in Thailand, her half-brother Brandon Jenner created a sexy video of his own.
Jenner, 32, captioned his own slow-mo pose, "We all know who's the hottest @Kimkardashian."
Some classic Barry White is playing in the background as Jenner strikes a pose. He even flashes a smile at the end of the video, admiring his parody.
So, the question is, who's the hottest - Kim or Brandon? (Videos below)