In this photo, Kylie seductively smiles at the camera as she poses on a balcony overlooking the beach in Malibu.
The outfit is definitely one of Kylie's more mature ensembles, with some serious cleavage exposure and a slit in the skirt that couldn't possibly be any higher.
Judging by some of the other photos that popped up on Instagram, it looks like this was part of a family photo shoot, with sister Khloe Kardashian also in attendance...although Khloe was much more covered up.
As for 18-year-old sister Kendall Jenner, she was sporting a pretty sexy ensemble, too, wearing a white backless dress.
Of course, the girls practically grew up in front of the camera, but do you think the teenagers are growing up a little too fast? Would you let your 16-year-old wear this outfit?
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Gallery | Kendall and Kylie Jenner: Stylish Sisters