We know that Kylie was in New York (where the show was filmed), because she had just attended the Glamour Women of the Year Awards with Cait and the rumor was that she was staying there to watch Kenny walk in the VS show. Then, on the day it was filmed, she was a no-show.
Turns out, that was intentional. When a fan asked Kylie on Twitter why Tyga was there, but she wasn't, she replied, "She didn't want all the pressure! She was everything tho."
In an interview with the New York Daily News, Kendall revealed that she told her whole famous fam (except her parents!) to stay away for exactly that reason. "It was too much pressure and I was like, 'Mom and Dad are good enough,'" she told them. "I just need the pressure off. There's enough pressure as it is."
Despite all that pressure, Kendall still KILLED it!