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Kourtney Kardashian is showing off her sexy side!

The 36-year-old reality star shared a series of photos of herself posing on a fur chair via Instagram on Wednesday night, and we have to give it to her -- she looks good.

WATCH: Kourtney Kardashian Shares Racy Photo in Barely-There Bikini

The hot mama-of-three -- who has been devoted to her fitness routine lately -- rocked a strapless black mini dress with thigh-high heeled boots for the sultry, impromptu shoot, keeping her hair pulled back in a flirty, voluminous ponytail.

In one of the photos, the brunette beauty leans back on a chair, arching her back and crossing her legs.

PHOTOS: Kourtney Kardashian Flaunts Her Booty in Tiny Bikini

She opened the blinds and switched up her pose for another flawless snap, which gave fans a slight peek at her toned backside.

So fierce!

WATCH: Kourtney Kardashian Shares Enviable Workout Pic

Earlier this month, Kardashian revealed some clues as to how she keeps up such a killer physique, with a key element being a lot of hardcore pushups.