Am I too logical?

Am I getting dumber? I was chatting with a stranger this morning and when I asked her "what do you do in your spare time?" She quickly answered "Sleeping." I was being polite and was trying to be interested, though I find people giving those answer stupid because there are a million and one things anyone can do that are production rather than sleeping, so I asked her "Why sleeping? Do you lack sleep?" Her answer was "Yes, cause I work for a call center and I was in night shift." This made me think... maybe she is a Team leader thus requiring her to work more hours but I highly doubt it by the way our conversation progressed. I politely asked her "How many hours is your shift? You seem to be working more than 8 hours." She answered saying "8 hours our normal work shift. Why are you asking my hours?" Now I wondered why would she lack sleep and on her spare time she would sleep... looking at it logically, 24 hours less her 8 hours shift would give her, 16 hours left. Of which, I could assume that 3 hours could be for travel time, 2 hours for lunch dinner and snacks. She would still have 11 hours left. If she sleeps 8 hours, then she would have 3 more hours to spare... now if on her spare time she sleeps, then meaning she would be sleeping for around 9-11 hours a day? I became curios on what other activities she does that would not be categorized as spare time... Her answers were, chatting, checking mails and cooking. Her definition of spare time is time you have before sleeping. So using her logic, if I chat for 2 hours then it is not considered leisure time? If I read a book mid day on a Saturday, then it is considered doing something on my spare time?

Yes I may attack this logically, but am I wrong with my logic? Then, what is considered as spare time?