Hypocrite

So lately I have been helping Barry study for his upcoming exam (he takes it a week from tomorrow). It is a clinical skills test where Barry will see 10-12 patients (all seperately of course) and try to figure out what's wrong with them and how to treat them. We have been reviewing several case studies together from a book. I read the example and act as "the patient" so when Barry ask me questions I say what symptoms/issues/medical history that the patient has.
Kara over heard us practicing yesterday. She really thought I was sick. She also heard Barry ask me how often I smoked. My response was I smoke a pack a day. After Barry left the room Kara came and questioned him about my cigarette smoking asking, "why does mom smoke." Barry said, "She doesn't." Kara said, "She said she did."
We explained what we were doing, but we're still not sure if she really understood the situation.
Today, Tanner heard us practicing and he heard me tell Barry that I usually drink about 3-4 beers a week. He was very concerned. So we had to explain again what we were doing. I showed him the book that I was reading from. I showed him that when Barry asks me a question I respond with what the book says. He finally understood...I think. Hopefully they don't think their mother is a hypocrite.