However, Kendall's older sister, Khloe Kardashian, isn't afraid to define their relationship. "Do I think they're dating? Yes," she exclusively told ET's Kevin Frazier while on the set of Kocktails With Khloe. "I don't know if they're like boyfriend-girlfriend. Nowadays, I don't know. People are weird with stuff. So, I don't know their title. But I mean, they were in St. Barts together hanging out. So, to me, that's dating."
Check out more of ET's candid interview with Khloe: