good post hun!
i think that when my son is old enough to start realising that mummy smoke big fags, then ill stop doing it, but when he is older and if he choose to smoke, get stoned, drink, or take drugs then i will explain the bad effects it had on me as a child, and explain to him that if he is going to do it, it must be in the house, where i can check on him and help him if he needs, dont get me wrong ill make sure he knows its bad, and ill make sure he knows im cross with him, but intill that day comes, he wont know a thing about what me and my husband had done as youngins.