Kim Kardashian West could have just starred in the music video for Fergie 's new single "M.I.L.F. $", but large sister Kourtney Kardashian is proving as soon as yet again that the milk-showering mom-of-two is not the only member of the Kardashian clan worthy of "MILF" standing. The eldest Kardashian sister manufactured a yesterday, flaunting her amazing physique in a plunging 1-piece swimsuit in Miami. The lower-lower La Perla design showed off the stunner's greatest assets, highlighting her trim waist and toned figure. The traditional suit was modernized with mesh cage panels along the straps and just under the bust, and turned up the heat with sporty cutouts at the back. Kardashian paired her sizzling search with a sleek higher ponytail, minimal gold jewelry, and oversize aviators. Later on in the day she covered up with a crisp white button-down. Keeping Up with the Kardashians star enjoyed the Miami heat with some close friends and her 3 youngsters, Mason, Penelope, and Reign. The 37-yr-outdated posted an Instagram pic of the event, captioned, "Beach dayz," in which she can be observed cooling off with her crew beneath the shade of umbrellas, with Penelope sporting a metallic gold bikini by her side. Pichichi / News Kardashian isn't a stranger to showing off what she's received. The hot mama took to Instagram just lately, donning a barely-there bikini and throwing up peace indications for the camera.