It would be very difficult for me. I watched my grandmother's health deteriorate because of it. All but one of my grandparents were smokers, and the ones who did suffered because of it. The one who did not smoke outlived two husbands and is still pretty healthy in her 80's.
My ex husband smoked. He quit smoking for a long time, about 2 years. Then he picked it up again and did so worse than before, refusing to even try to quit again. I became resentful toward him because I could see what he was setting me up for, taking care of him while he suffered a slow death younger than he would have to die otherwise. I expected to be used up and drained and then left a widow because of his choice. We divorced for other reasons, but I don't feel bad admitting that not having to face that future is a relief to me.
You also have to consider that second hand smoke has a very bad effect on the those around the smokers. It has been shown to cause asthma and respiratory illness in children of smokers, and lung cancer in adults. You have to consider if you want to risk getting lung cancer and put your children at risk of respiratory illness.
