Show her that she's wrong. At the same time, be respectful of her wishes. If she doesn't want you smoking at your house then don't. Go to college (or a tech school / whatever), become a resonsible citizen, then be like, "IN YOUR FACE. I have more years of college under my belt then you AND I've been stoned the whole time." (Well....don't say that, but you get the point...and if not then respectfully tell her you've gone far in life and weed has been nothing but a harmless hobby)