Celebrity Kourtney Kardashian-Barker Kourtney Kardashian Just Wore the Tiniest Floral Bikini She and boyfriend Travis Barker celebrated Memorial Day with her kids. By Tessa Petak Tessa Petak Instagram Tessa Petak is a Brooklyn-based writer who helps to cultivate InStyle's illustrious news coverage across a wide range of topics including celebrity, fashion, and entertainment. She also produces and composes celebrity profiles and features for the site and InStyle's digital issues. InStyle's editorial guidelines Published on June 1, 2021 @ 09:44AM Pin Share Tweet Email Kourtney Kardashian celebrated the holiday in style. The Poosh founder took to Instagram to document how she spent her Memorial Day, which included spending time with her youngest son Reign and daughter Penelope, as well as her boyfriend Travis Barker. The Keeping Up With the Kardashians star posted a series of pictures and videos from the holiday, including a selfie she took from an angle below showing off a colorful floral string bikini that she paired with black shades and long messy hair. Other videos in the post showed her and Barker rolling down a hill with two of her kids, as well as sliding down a giant blowup waterslide. The Blink 182 drummer also shared a video on his Instagram of him and Reign sliding down the giant inflatable slide before he looks at the camera and laughs. See a Complete Timeline of Kourtney Kardashian and Travis Barker's Relationship It seems the two are growing close with each other's families. A source recently told E! News that "Kourtney has become very close with Travis' kids recently, especially when it comes to Alabama." Barker shares Alabama and Landon with ex-wife Shanna Moakler and Kardashian shares her three kids, Reign, Penelope, and Mason with ex Scott Disick.