I'm thinking of ending things

The story is narrated by Jake's unnamed girlfriend of only a few months. They met in a pub, during a college trivia night, and Jake gave her his phone number by writing it on a piece of paper and slipping it into her bag. Several weeks later, he takes her to meet his parents on their remote farm. She has been considering "ending things", but has not told him yet. It is a long drive, and they engage in lengthy philosophical discussions.