表达喜好：I like doing... — 英语阅读题

Read the short passage and answer the question. Hi, I'm Ben. On Saturday, I have fun with my family. I like playing football in the park. My sister Mary likes flying a kite. My dad likes riding a bike. My mum doesn't like ball games. She likes singing songs at home. We are all very happy together. Question: What does Ben's mum like doing? You can answer in English or Chinese.