Courtney Kardashian defiantly responded to a fan who shamed her for posting a sexy photo on the birthday of her niece Stormy.

On Friday, February 1, that day when her niece was 1 year old, her famous aunt took a photo of herself in white lace underwear in front of the bathroom.

Noting a special occasion, an Instagram user responded to a photo by writing: “The most touching birthday wish for Stormy.”

Never one to back down from a challenge, the eldest of the Kardashian-Jenner siblings slammed the troll with a cheeky response: “She has no Instagram yet, but Stormi, if you read this happy 1st birthday!”

A mother of three children posted a video about how she brings the birthday girl in Instagram Stories later on Friday. “Look who it is?” Kardashian whispered to Stormy, looking in the mirror.