Blueberries?

At the beginning of their journey. Emily had held on to the hope that they were not going anywhere too far. That wherever it was that Derek had decided that the two of them just had to be. It was at most around 30 minutes out of the city. Given the slow, leisurely pace that Derek was driving at, she had assumed that that would be the case.

Emily had never known him to be patient when it came to long car trips, so she had been banking on that. As it turned out, she had been very wrong. 

Her mistake had been in assuming that, Derek, just because he hated being cooped up in a car for too long while working. Would also hate the feeling when traveling for leisure. 

Clearly she had been wrong. In her defence, Emily had held on for as long as she could. She had lain in her seat, her eyes closed.