Kendall Jenner wears "Turquoise Bikini” in Malibu, California

He became a big brother for the first time last weekend.
And Kendall Jenner is making sure that her adorable nephew Mason doesn't feel left out following the birth of Kourtney Kardashian and Scott Disick's second child, Penelope Scotland.

The 16-year-old model spent yesterday entertaining the two-year-old tot on the beach in Malibu, California.

 Model figure: Kendall showcased her washboard abs in a cute turquoise bikini (Read more and See more Pictures)