Kourtney Kardashian posed in her birthday suit for her 38th birthday in a picture the reality star shared to her social media accounts on Tuesday.

birthday suit

A post shared by Kourtney Kardashian (@kourtneykardash) on

Kardashian is the mother of three children, ages 7, 4 and 2. As a mother, Kardashian recently made a commitment to exercise and good diet. “I think I take time for myself now to work out every day, which I never did – especially having three young kids,” Kardashian told E! News last year.

“I just never made it a priority and now it just makes me feel so much better – mentally and physically, just to really take that time,” the reality star said.

> KOURTNEY KARDASHIAN’S uBIO: HER STORY IN HER WORDS.

A year later, Kardashian seems proud to share the results of her commitment to her body. Her siblings feel the same way.

Her sister, Kim Kardashian West posted a photo of the two sisters outside in bikinis on Kourtney’s birthday. “Kourt looking for zero fucks to give on her 38th bday looking soooo good,” Kardashian West’s caption read.

Kourt looking for zero fucks to give on her 38th bday looking soooo good

A post shared by Kim Kardashian West (@kimkardashian) on

Khloe Kardashian posted a video tribute to her sister on her birthday as well. The caption reads, “Happy birthday to the Milly to my Vanilli.”

Happy birthday to the Milly to my Vanilli @kourtneykardash

A post shared by Khloé (@khloekardashian) on

Kourtney spent the day celebrating with her three children and their father, Scott Disick, at Disneyland.