I agree - put your money in a bank account, just keep a couple bucks in your sneaker or somewhere she won't know about. Tell your mom that you will not give her cigarette money ever again. If she gets mad, tell her you care about her, and that smoking is so bad for her, and all those around her, that you feel it's your moral obligation not to support that habit. Tell her she should be proud that she has raised a daughter with strong morals and the fortitude to not back down. Then stick your fingers in your ears while she hollers. (If you lived near me I'd offer you my couch to sleep on as refuge 'til she calms back down, be that ten minutes or ten years.)