[ripdog]

Does your sister really not know? In this day and age? Man, maybe ratting her out for being so dense would be the way to go here. Seriously though, I think your move depends on your relationship with the kid. I think that ratting him out is a gigantic pussy move. If you have any credibility on the subject, talk to him yourself. By credibility I mean that you've smoked a fair amount yourself and have seen the error of your ways. If you were a straight-laced valedictorian type at his age--forget it. Find someone that can relate to the kid and have them approach him. Maybe that's your sister or his dad, maybe not. I would never have forgiven one of my uncle's for tattling on me and I think you'll destroy any shot at a relationship with him if you go the tattle-tail route.