This is a real tough one. Let me see, well first of all I would say that I totally can understand where you are coming from in more way than one. Its aparant why you dont want him smoking and being around Carly...not a good influance... I also understand that you dont wnat him to smoke, becuase you dont know if or when it will lead to other harder drugs. Sometimes, not all the time, people who use drugs and then stop will start again if they start smoking pot. As much as people want to say that its NOT a gateway drug, it sure as heck is if you have had a problem with drugs in the past.
One other thing I wanted to say is that I am not sure if it is the best thing to threaten him to stop smoking. I agree with Ingi in that you guys need to sit down and have a serious talk about how it makes you feel. Let me tell you that I have seen WAY WAY to many times in that the wife doesn't want the husband to smoke and finds out about him smoking and threatens him if she finds out about it, and he will continue to hide it and do it more. I have seen this kind of behavior RUIN marriages more than once with my friends and family. Threatening only makes the guy want to hide it more and he will think hes getting better at it.
Wow, sorry, went off on a tangent there. I have had some personal experience with this Rachel, so thats why I am so pationate about it.
If you ever want to talk about it, PM me and we can talk...