Point out your mom's hypocrisy to her, and see what happens. It goes like this:

Mom: Do you smoke? Be honest.

You: What happens if I say yes?

Mom: I send you to a prep school and you never see your friends again.

You: Mom, what the hell do you expect me to say? Even if I did smoke (and I'm not saying I do) would you really expect me to be honest with you if you threaten such a harsh punishment?

Mom: Uh....

You: That's right. Now shut your mouth and get back in the kitchen!


Well, maybe you should leave out that last part.