Keeping my child away from 2nd hand smoke- how far is TOO far?

I’ve always found the smell of cigarette smokers very sickening. I’m due to have our first child in February, and feel very strongly about keeping my child away from cigarette smoke as much as possible.

My mother smokes in the house and has broken trust w/ her smoking habits in the past so that I do not trust her judgement or that she will respect my wishes (smoked in my car after she promised not to while borrowing it, lies to my father about smoking in the house, smoked through all of her pregnancies). Where I stand right now is not letting my child stay at my parent’s house for a day/weekend/etc. without me there to supervise things unless my mom quits smoking completely. This is especially unfair to my father who doesn’t smoke and also wants my mom to stop.

I don’t want to deprive my child of spending time with its grandparents, but I also feel that it’s my job as a mother to protect my child in the best way I know how. I just wonder if this will be a decision I live to regret or am proud of….

Also, has anyone done research on the effects of cigarette smokers handling infants? I once read an article claiming that even having the smell on your hands and clothes could lower an infant’s immune system, but I can’t find it now.

Please give me any advice/opinions you have because this is a tough decision for me to make!