The 20-year-old model posted a short Snapchat video entitled “the best kisses” showing a close-up of her and baby Stormi cuddling on the bed.
As Stormi plays with Jenner’s hair, and gives it a playful tug, a gold stud earring can clearly be seen in the baby’s earlobe.
Jenner responds to the hair-pull by planting a big kiss on Stormi’s face.
The businesswoman – who has recently been named one of Forbes magazine’s richest self-made women – has said she will consider passing on her cosmetics empire to Stormi “if she’s into it”.
Kylie Cosmetics has sold more than $630m (£475m) worth of products.
Forbes has estimated the company is worth $800m (£600m).
Jenner had her first child with rapper and producer Travis Scott, 27, in February.
The youngest woman on the list, Jenner ranked at number 27, beating her sister Kim Kardashian West, who made it to 54th place.
However, some have questioned her suitability at being labelled “self-made”, due to the vast influence of the Kardashian-Jenner family behind her.
The official Twitter account of Dictionary.com posted the definition of self-made as “having succeeded in life unaided”.
Jenner – who has more than 110 million Instagram followers – told the magazine she owed much of her success to social media.
Despite being a former fan of cosmetic procedures, the make-up mogul has recently adopted a more natural look, having her trademark lip filler removed.