How do I get my mother to stop smoking inside?

I keep telling her that I don’t like her smoking inside. The smell of smoke gives me headaches and I don’t want to be introduced to second hand smoke. I keep telling her these things, but she is convinced that there is nothing wrong. She smokes under a vent and says that the smoke just goes up the vent, which we both know (since I told her) that is not true. How do I get her to stop smoking inside?

embarrass her. tell her in front of her friends that she is harming your health my smoking inside.