Well, I hate dealing with closed minded people. Really, just gotta deal with it until your out of the house. What else are you going to do? You could move out thats your best bet to get away from them and do whatever you want.
Drink alot of water and pass it and never take another puff until your out of the house. Lying to people sucks, don't do it, wait until your out. Thats what I'd do. Good Luck.