This isn't the first time that Kardashian — a mom of three who gave birth to her third child, Reign Aston Disick, last December — has shown those maternal instincts: During an earlier Vegas jaunt a few weeks ago, she shared another Insta snap of herself pumping breast milk, joining a slew of
other celeb moms, such as Gisele Bundchen and Alyssa Milano, who have embraced the #brelfies craze.