Kourtney Kardashian Just Wore the Tiniest Floral Bikini

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.

RELATED: 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.