Do you want her to stop smoking or just to stop doing it in the house?
If she's in her late 60's or 70's I wouldn't even bother trying to get her to fully stop. Why bother? If she enjoys smoking then let her. I'd rather slowly waste away while doing something I enjoy, as opposed to wasting away in an utterly miserable state.
__________________ Chicken Boo, what's the matter with you? You don't act like the other chickens do. You wear a disguise to look like human guys, but you're not a man you're a Chicken Boo.
To be fair, my grandmother smokes, and she's outlived her two sisters who both quit. They both died within a year of quitting, supposedly their lungs were so heavy with tar that the tar was actually essential to the lungs working, and when they quit, their lungs just disintegrated or something. Or that could be bullshit. Either way, she's outlived them by at least 4 or 5 years at this point, so it's probably best to let your grandma keep smoking.
Plus, god forbid you guys ever get caught in a fire, she's going to be able to stay conscious way longer than you.
Whether she decides to drag your passed out ass from the flames or not might depend on how much you've been bugging her lately to quit smoking.
Just saying.