Khloé Kardashian is just as confused as everyone else when it comes to the relationship between her youngest sister Kylie Jenner and her boyfriend Tyga. The 18-year-old and her 26-year-old rapper boyfriend have not been spotted out together in public as much as they previously had, which led some fans to question the status of their on-again-off-again relationship.

"I ask Kylie...'I think you were just somewhere for New Year's with him' and then like one day, they're not together," Kardashian told E! News' Catt Sadler. "That's the life of an 18-year-old...So I stopped asking her, because it's confusing and I hate telling people, 'Oh, they broke up' and then all of a sudden, someone pulls in my driveway and I'm like, 'Oh, s-t, I thought we were done with this one.'"

Although the standing of Kylie and Tyga's relationship is unknown, the two did spend time together on Christmas Eve, and they also went on vacation with friends to Mammoth Lakes, Calif. right after New Years. Those two appearances were the first time the couple was spotted together in almost a month.

"I'm just as confused!" Kardashian joked. "I need like a 'Note to self-who is everybody dating in this family.'"

Kardashian also opened up about another one of her sisters relationships, as HNGN previously reported. Her model sister Kendall Jenner was seen vacationing with One Direction member Harry Styles last weekend in St. Barts where the possible couple displayed tons of PDA.

"Do I think they're dating? Yes," Kardashian told Entertainment Tonight. "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."