They were spotted holding hands during Ky's b-day celebration in Mexico and they were even spotted cozying up together on a yacht in St. Barts.
When they went flyboarding together, the pair held hands and it was actually kind of cute. Plus, if you've ever been flyboarding, you know how hard it is to even get your balance on those things, so the fact that they made their way over to each other and did this little hand-holding this is as impressive as it is adorable.
Kylie's sister Kendall Jenner also gave it a go and she showed off some pretty serious skills, too. On Keeping Up With The Kardashians, Kylie said that her adrenaline junkie tendencies are definitely more a Jenner trait and since we only saw the Jenners on the flyboard, it looks like her theory holds true.
Then again, in Kim Kardashian's defense, she's pregnant, so she couldn't go. But why didn't Kourtney and Khloe Kardashian give it a go?