Kendall Jenner Goes Boating with the Family While Kylie Shops with Willow Smith

Kendall Jenner shows off her flat stomach as she walks on a dock and heads to a boat while filming scenes for Keeping Up with the Kardashians on Sunday afternoon (June 29) in the Hamptons, New York.

The 18-year-old model was joined for the outing by her sisters Kourtney and Khloe Kardashian, and her nephew Mason.

PHOTOS: Check out the latest pics of Kylie Jenner

A few days earlier, Kendall‘s younger sister Kylie, 16, was spotted shopping at Tokio 7 with her good pal Willow Smith, 13, in New York City.

FYI: Kylie is wearing a Saunder skirt.