Uzo Aduba, her "Emmy" Fly Coach to NYC, Gives First Class Seat to Invalid

Remember she just won an Emmy in her role in the hit series, "Orange is the New Black"?

Anywho, Uzo decided to travel to New York City with her team, and chose instead to fly coach after switching her first class seat with a woman who had recently had surgery, and was in pain; who interestingly also doubles as her mum.

Question is why didn't she just have two first class seats booked prior the trip?