You can't convice anyone to change their minds. Once they get taught something, it is impossible to change their minds. Trust me, I have run into many anti smoking people and even presented my buddy's (now) ex-girlfriend with proven marijuana facts, and her reponse was, "you don't really believe that do you?"

See what I mean? See, we have learned and know how harmless cannabis can be, but them on the other hand, have been taught the other way around. If whatever they believe in is wrong or not, in their minds, they really think the worst of it, so there is no convincing her, so don't bother. You'll just be wasting your time, even if you show her all this info. from here and other sources, they will not believe it.

Anyways, I've made my point.

I suggest you just get to the bags before she does. Nah, that's bad advice.

Just go over there and make a new smoking buddy with the guy. Maybe if both of you are there, you can both smoke it up before the controlling women comes around.