Now we know why Kendall Jenner, 16, and her sister Kylie, 14, are so comfortable with their bodies. This bikini photo of their mom, Kris, says it all!

The Jenner ladies chilled poolside while celebrating the 4th of July holiday, and in the process, showed off a little skin.

Kendall Tweeted, "outside alllll day, so many freckles #freckleyken'"

It's tough to keep up with those Kardashians Jenners!