So, when those people returned to the crew, Sophia started to get a bit anxious. She asked David, "Uncle, I'm done eating now, and I have my wallet with me. Can I just leave now? I can find my way home! I can take a taxi later and have the driver drop me off right at my doorstep!"
Sophia had completely changed. When she first arrived, she was constantly observing everything, trying to figure out how to communicate with everyone. Now, she became extremely well-behaved, only thinking about how to leave as soon as possible. Saying anything extra in this place was a mistake.
So, she thought that if nobody was paying attention to her, she could just hop into a car and leave!
Upon hearing Sophia's words, David smacked his own head, blaming himself for being so forgetful. He was either stuck in an awkward situation or worried about the scenes they had filmed in the afternoon. He had completely forgotten that he was supposed to take Sophia home.