I'm 38+5 and my fiancé and I live with his dad and step-mom along with a friend of theirs and both of their children. My fiancés dad and step-mom smoke weed all the time in the house. I don't want my son around it but living with them is our only option right now and we are working on getting a car, then our own place to live. I was just wondering if anyone had any advice to give me on what to do when they start smoking. I obviously can't ask them not to smoke in their own house. What should I do for the time being until we get our own place?