In my pre-trance contacts I generally encourage customers to guarantee there will be no cigarettes in their condition for when they return home after the session. The main square to this is if there is another smoker in the house.
For this situation then you should arrange a few spaces which will be without smoke, in addition to have the other smoker consent to not give you a cigarette under any condition. One customer who couldn’t get this understanding booked himself into a motel for two evenings to dodge any contact. I need to state that I truly appreciated this dimension of duty.