Please don't try to make her choose Cig's over you. I know what its like to be addicted to the fuckers, and when you REALLY want one you'll try to sneak one, even if this means you'll hurt those close to you. I suggest you get her that chewing gum stuff, and mybe make her put her Cig butts in a jar full of water, everytime she craves one, make her smell the jar, it'll throw her right off.