Photo: Kourtney Kardashian/Instagram

Kourtney Kardashian StormiCredit: Kourtney Kardashian/Instagram

Kourtney Kardashianis celebrating her niece’s birthday on her own terms.

On Friday, the reality star posted asexy photo to Instagramin which she sat on the bathroom floor and leaned up against the bathtub, wearing only a lacy white bra and underwear.

“Busy until further notice,” the 39-year-old mom of three wrote alongside the shot, which was also shared on the same day thatKylie Jenner‘s daughterStormi Websterturned one.

To some fans, the seductive photo came as quite a shock, considering multiple members of the KarJenner clan — including Stormi’s auntKim Kardashian Westand auntKendall Jenner— were using their social media to celebrate the second-youngest member’s first year.

But one particular follower was not afraid to bring it to theKeeping Up with the Kardashiansstar’s attention.

“the most touching birthday wish for stormi,” the user sarcastically commented on Kourtney’s sexy shot.

In response, Kourtney clapped back: “she doesn’t have Instagram yet, but Stormi if you’re reading this Happy 1st Birthday!”

Shortly after the comment exchange, Kourtney posted a video to her Instagram Stories in honor of her niece’s 1st birthday.

“My little Stormaloo how I love you so angel girl,” she wrote in the corner of the video. “Happy Birthday!”

Kourtney Kardashian’s comment back to the fan.Kourtney Kardashian/Instagram

Kourtney Stormi first birthdayCredit: Kourtney Kardashian/Instagram

In addition to Kourtney, the rest of Kylie’s sisters — minusKhloé Kardashian— andKris Jennerall wrote sweet tributes to the birthday girl on Friday.

In maybe the cutest photo of all, Kendall, 23, planted a kiss on her smiling niece’s cheek,captioning the adorable image, “Sweet, tiny noodle! your energy is powerful, i hope the world offers you nothing but beautiful things. i love you Stormeroo! happy 1st birthday 🦋”

Along with her extended fam, Stormi’s parents Kylie andTravis Scottalso posted messages to their daughter on social media.

“I know you won’t remember much about the first year of your life but i pray that you’ll never forget to keep sharing your joy and laughter with the world.”

“My love grows for you a thousand miles a minute,” Kylie continued. “Every day with you is the best day of my life. happy birthday to my angel on earth. 🎈”

Added Travis, 26: “ITS MY QUEEN ,MY HEART, MY AIR , MY EVERYTHING. STORMI’S BIRTHDAY TODAY. I LOVE U SO MUCH BABY,” the rapper wrote, tacking his heartfelt messageon to a gallery of photosand clips.

Stormi kicked off her birthday festivitieswith a tropical getaway last monthalongside her mom and Kylie’s best friendJordyn Woods.

The luxury vacation saw the gals posing together whilewearing matching neon-green swimsuits, frolicking on the beach, spending time on the water aboard a boat and more.

Kyliefirst started thinkingof how she wanted to celebrate Stormi’s first year of life when she hit the 5-month mark in June.

But after months of planning of her birthday bash, however, Kylie revealed on her Instagram Stories Friday that the party was not happening due to the inclement weather.

RELATED VIDEO:Kylie JennerSays There’s ‘Nothing Better’ than Holding Her Daughter Stormi: ‘My Little Love’

“Alright so, we were supposed to have Stormi’s birthday party this weekend,” she explained. “It’s not happening because it was supposed to rain and it’s not raining anymore.

Of course, rain or shine, Stormi’s big day couldn’t end without a celebration.

“It didn’t end up raining, but better safe than sorry,” Jenner said. “We have all her cousins here [and] everybody who loves her. We’re playing with farm animals.”

Jenner then shared videos and photos from Stormi’s impromptu party, which included a massive rainbow sprinkle-topped cake, an adorably decorated table with lavish balloon bouquets, rainbow placemats and party cone hats, and farm animals.

source: people.com