She doesn't, they don't.

Olivia waits outside her house for roughly 10 minutes, the few cars that pass by all honk at her, the drivers staring in shock, she just waves at them. Finally her friends arrive, also staring at her in shock, before grinning and telling her to get in, they are running late. Olivia hops into the crowded car, watching the world outside pass by, on the drive to the airport, a few trucks honk at the car, Olivia still not realizing. One of the girls tries to keep her distracted as they arrive at the airport, talking to her, arguing over bags, meanwhile Olivia does not realize her jiggly naked ass is in open view of everyone outside.