What else are sisters for? In this exclusive sneak peek at the upcoming 18th season of Keeping Up With the Kardashians, Kylie Jenner shows sister Kendall Jenner her new Kylie Cosmetics collaboration with Balmain, which the fashion house used during a runway collection last year. "I need to create a look for the models, so since you're a model, I need you here to try to create a look," Kylie tells her big sis. "I love just having a day off with no makeup, so I must really love you for letting you