My girlfriend told me that she quit smoking about 10 months ago. I have found her smoking at least once a month since then. I let it go at first because I figured it was hard and she was trying. Now she is smoking behind my back everychance she has alone. She has multiple packs of cigarettes hidden in different places and it is obvious that she is smoking when im not around. She does not know that I know about this. This has been an ongoing issue that I am just tired of talking about, but I am so mad about her doing this behind my back that I just think I need to bring it up even though I do not want to have the same conversation over and over. Every time we have this conversation she gets defensive and it turns into a fight that she says is my fault. It is not the smoking that bothers me at this point, it is that she is going behind my back and doing it and still acting like she quit and is so proud of herself for quitting. What should I do in this situation?