We have been together over ten years now. She smoked before we were ever together. I have never smoked. I have made insinuations (usually in a joking nature) that she needs to quit, but she basically says it's her body, her choice. She is respectful, she smokes outside all the time, and not in the car. So, she is only hurting herself. I know it can't be good for her, and someday she will see it in her health (she's only 32 right now). What can I do about it when I know she will resist me?