Last week, Kylie Jenner went to Europe with Tyga, in order to join the rapper on tour.
The trip has been widely criticized, as Kylie is 17, Tyga is 24, and all of the countries they've visited have lower ages of consent than the United States.
Needless to say, no one is more concerned about Kylie than her family, and sources claim Bruce Jenner and the Kardashian sisters are all very pissed off that Kylie was permitted to travel internationally with her much older boyfriend.
"Kim, Khloe, and Kourtney are all extremely angry because Kylie is their baby and they don't think she should be globetrotting Europe unsupervised," says a family friend.
"[Kylie] told Kris that she's going to help her music career and learn the ins and outs, but they simply don't but it."