hmmm, you are in a tough spot. my poppa drinks and drugs infront of us kids all the time. he has since we were very young children. everything from booze to weed to herion . we just saw it as a normal part of daily life when we were growing up, no one ever told us it was 'bad' or 'wrong'. when we got older, of course we knew that drugs and booze can cause problems and blahblahblah.
all i can say is now my two sisters are alcholics, i am a drug addict and my brother is on his way to both. my dad still drinks and does drugs but now he tells us how 'bad' it is and that we shouldn't do it. well, we all know that now, but it's too late for him to preach about when he's doing the same thing. that's totally hypocritical.
I really need some help with resolving the "do as I say, not as I do" conflict.
as a parent it is natural that you are going to tell her not to smoke weed and that it isn't good for her, and i expect that from any parent, a non-smoker OR a smoker ... but she probably will not listen.
my sister and i discussed this the other day actually. we ourselves know basic rules of what is right and what is wrong in the outside world, but when you grow up around something, even if it is deemed wrong outside of your home, but is still being done around you, you feel okay about it.
she's already seen you do it, if she's anything like me she won't respect your "dont do it"s and she'll decide on her own what's best.
hope all works out.