When Nash discovers that his co-worker, Aubrey, is about to spend Christmas alone, he invites her to spend the holiday with him and his family. The arrangement is mutually beneficial; she gets a real holiday, and Nash, a buffer from his mother’s relentless match-making.
When Nash introduces Aubrey to his parents, she does more than provide him with a buffer. She provides him with a girlfriend—herself. Nash is surprised but he figures it’s only for a few days. Once Christmas is over and they’re back home, they can break up and everything will go back to normal.