The reality stars have a whole bunch of nieces and nephews (and just got a new nephew, thanks to Kim Kardashian and Kanye West), but last night it was all about little Reign Aston Disick.
Kylie posted this last night, where she and fellow "cool aunt" Kendall Jenner are wearing matching long camo coats and gushing over their adorable 1-year-old nephew at his birthday party:
"The cool aunts," Ky captioned the vid. She also posted this sweet video with the caption, "I love you baby angel."
As for Kendall, she posted this pic of herself and Reign, joking that this is totally what she would look like as a mom:
Seriously, though, how cute is little Reign?!