You and ian didn't know each other, but you both seeing each other. because You're an FA and he a is Pilot.

One day you and your friends are in bar celebrating. And ian is there too, with his friends drinking beer

Fast forward You didn't know that you had a one night stand with the pilot. because you're all drunk and him also.

you woke up, without clothes and he is fixing his tie already because he have a flight today