Hey M Girls!
What would you do if Kendall or Kylie Jenner were your aunt?!
The Jenner's half-sister, Kourtney Kardashian's, adorbs son, Mason, turns three-years-old today -- how adorbs!
The girls gave lil Mase their best wishes: "Happy birthday to our favorite little guy, Mason!!! Today, the handsome man turns THREE! We love you so much! xoxoxo."
Here's one more cute pic below that the girls posted on their website:
Let's dish: - Do you think Kendall and Kylie are good aunts?
Photo courtesy of Kendall and Kylie Jenner's official website