Though it can be difficult for siblings to get along at times, it seems that Kim Kardashian and Kanye West's middle child, Saint West, is really enjoying being an older brother.

On Saturday, March 31, the self-proclaimed selfie queen took to Instagram to share the sweetest photo of Saint and his little sister, Chicago WestIn the new picture, Chicago is sleeping peacefully as her brother gives her a kiss on the nose.

"He loves her so much," the Keeping Up With the Kardashians star captioned the photo.

 He loves her so much A post shared by  Kim Kardashian West (@kimkardashian) on Mar 31, 2018 at 9:11am PDT

Baby Chi 

Fans of Kardashian know that she now shares three children with her rapper husband: 4-year-old North, 2-year-old Saint, and 2-month old Chicago West.

As per reports, Chicago arrived on Jan. 15 via surrogate, weighing in at 7 pounds and 6 ounces. A day after she was born, Kardashian took to her official website to reveal the news.

"We are incredibly grateful to our surrogate who made our dreams come true with the greatest gift one could give and to our wonderful doctors and nurses for their special care. North and Saint are especially thrilled to welcome their baby sister," the 37-year-old wrote.

Kardashian's social media followers got their first glimpse of baby Chi when the KKW Beauty founder shared a photo of herself and the infant via Instagram in February. In the photo, the mother and daughter both don the pink Snapchat teddy bear filter.

"Baby Chicago," the reality star captioned the photo.

Then on St. Patrick's Day, Chi got her very first selfie as Kardashian posted a photo of her wearing a pink onesie with a white bib around her neck as she gazes up at the camera.

 Morning cutie A post shared by  Kim Kardashian West (@kimkardashian) on Mar 17, 2018 at 7:15am PDT

"Morning cutie," the makeup mogul labeled the shot along with a heart emoji. 

Now that Kardashian and West have three children, many have been wondering if they would have another child via surrogate. A source close to the two explained that Kim is up for the idea but only if it's not anytime soon