How to ask my mom...

Amy

Ok....so my mom smokes ciggeretes and always has since she was about 11 shes in hee 50s now. Im 7wks preg tomorrow. How do i tell her that when our baby is born i dont want it to be exposed to the smoke in any way. Not even on her clothes. How do i tell her she needs to quit smoking. Shes tried in the past but never lasted more than about a week.

Also we currently live with my parents. But we r trying to buy our own home.