The fan - with the handle - pointed out that a baby is the size of an avocado at 16 weeks.
The mother of three was seen strutting down a path in silver high heels as her black sheer lingerie which clung to her curves.
The photo backlash comes as fans think Kourtney might be pregnant with her fiance baby.
She also stunned as she sported a daring nipple ring accessory that was attached to a black undergarment.
Kourtney seemed to spark pregnancy rumors when a user recently noticed that she has been that she had received.