Why did Xuan Bin and Tang Wei fail to get what they wanted in the hotel in "Late Autumn"

So when she was about to go back to prison, Anna asked Xun: "Do you want me?" which means "Let's find a hotel!" Xun smiled and said, "I'm good at it." You must know that Anna was actually a happy woman who was once surrounded by love, but on that day, she accidentally killed her husband. Everything has changed. He, who was infatuated with him when he was a child, got married and had his own happy family; his doting mother left, and his so-called brothers and sisters were fighting to separate the family. The warmth and warmth of human relationships are evident. At this time, Anna is alone in facing all this indifference, and she desperately longs to be loved. However, in the vast sea of ??people, only the man in front of her could soothe her hurt heart. As they were making out, Anna pushed Xun away. Why? First: As mentioned before, she longed to be loved. However, in such a short period of time, she initially thought that she might find a hotel where she could feel love for a short time; second, when they were intimate, she realized how beautiful the man in front of her was. She suddenly realized that she couldn't feel loved by doing this now; thirdly, this link was only to promote the development of the plot. For this reason, the story of the two of them could continue better.