和妈妈坐火车卧铺去北京

The old lady was so scared that her whole body was shaking, but she didn't know how to answer. In fact, she had been doing what her two sons said, but she didn't know what happened just now. She suddenly felt a sudden numbness in her body, and she stood up involuntarily, as if there was something on the ground. It looked like something was biting her!...