In case you don't happen to live in same neighborhood as the famous fam (the real or fake one), Kylie took the liberty of posting her bikini-clad butt on Instagram so that the rest of the world could get a good look.
The photo caption said something about a treehouse, but we're guessing that out of the 510,000 people that "liked" the photo, a total of zero of them probably cared about the caption.
Kylie seems to be on a crusade to show everyone that she has an amazing body. In fact, she recently posted a photo of herself from the front rocking the same sexy swimsuit. You look good, girl...do you really need 510 thousand people to tell you so? There, now it's 510,001 because we just told you, too.