...Just going to reiterate the fact that I really don't think it's about him using or where he was using or any of that. I believe this issue is that fact that he went back on some form of agreement. We do not know if it was a compromise or a "I really wish you only did it on the weekend" "Okay, I will", or even a "Only do it on the weekends." "Fine." type of a agreement. Either way, it sounds, to me, that it was something he agreed upon in some manner that he would only smoke on the weekends. Personally, I think the main issue would be the same regardless of what the "it" he does is.. video games, drinking, sex with other people, hell it could even be cooking (You're only allowed to cook on the weekends when I'm there to make sure you don't burn the house down, or something equally as ridiculous/out there for people not in the situation). If he knew that he wouldn't stick to it, then he shouldn't have agreed to her wish/command/desire under any circumstance. Maybe it was unfair of her to ask that of him, but he agreed to it, and, in my opinion, it is disrespectful to go back on his word.