In conduction my interview

During my interview, I have noticed some thing about my interviewee. I was also surprised my interview as a my friend. She was strong to have her opinions. She generally understood why she is working because she was answering my questions in a clear and firm tone of voice, quickly. She told me she work only for money and she does not care about what her boss thinks about her. However, suddenly she was slow down to speaking when I asked about her private time. She worked 6 day a week. For example, I asked what do you to have fun in your off. She was laughing to answer that "I'm trying to have fun". I knew that could not because she has to do the house work in her off. I felt he is really tired emotionally.