The mother-of-one debuted new false nail extensions in shades commonly associated with baby boys and girls with her 130million Instagram followers.
Kylie, whose popular Kylie Cosmetics range has helped turn her into the world's youngest billionaire at just 21, captioned the snap: 'Back at it again with nail bae.'
But the post inadvertently led to claims that the reality star, who welcomed first child Stormi with rapper Travis Scott in February 2018, is pregnant.
Commenting on the snap, one fan replied: 'More like back at it again with a second baby.'
While another wrote: 'All I see in this picture is that she’s pregnant with a girl or boy ???!!!??'
Offering a blunt response, a third added: 'Kylie is pregnant I said it first.'