Kourtney, 41, was playing dress-up in her walk-in wardrobe in a series of racy snaps while trying on different outfits.
The mum-of-three looked gorgeous as she flaunted her ample cleavage after ditching her bra under a plunging black blazer.
She pushed her assets together to ensure they took centre-stage in the snap, leaving her followers very hot under the collar.
The brunette bombshell paired the daring top with a high-waisted pencil skirt with a very high thigh-split.
Kourtney's legs stole the show as the slit in the figure-hugging material highlighted her toned pins, which were encased in sheer tights.
She finished the look off with matching black gloves as she posed in front of the mirror while laughing.
The reality TV star's sleek dark hair fell around her shoulders as she kept her look simple but elegant.
She added a slick of nude lipstick as she looked off into the distance, sending her fans wild as she shared a series of snaps of her looking like she was having the time of her life.
Unsurprisingly, it didn't take long for the compliments to come pouring in for the star, as fans rushed to the snap to gush over her happy pictures.
One posted: "Yes looks and poses."
Another agreed: "Obsessed with this outfit."
A third added: "Omg so cute."
A fourth chipped in: "She looks the same from 2005. She never ages."
Kourtney shares three children with her ex Scott Disick, who has recently split from his girlfriend Sofia Richie, 22.
He was later seen with Amelia Hamlin, 19m who is the daughter of reality TV star Lisa Rinna.
The pair were seen looking very cosy as they put her arms round each other and held hands while walking on the beach in Malibu.