I didn't know anything about her but I agree with you on the second hand smoke thing - especially around children. I have the most beautiful five year old grandson who had been a two pound preemy. I try not to preach but if there were one thing I could do I'd have my daughter-in-law stop smoking. She believes that smoking in the basement family room when my grandson is in another part of the house is okay.
It's nine years for me without a relapse. Probably the single most important thing a person can do. But, it's legal and people have the right to kill themselves with their vice of choice.
I quit smoking 21 years ago. I still dread it when I have a chest X-ray. My father died of Lung Cancer from smoking at 60. 3 years away.....
If it makes you feel any better, my mother smoked around me all my life and the smoking never caused me harm. My best friend smoked while preggers with both of her kids and they were 10 and 8 pounds. Genius IQ's, both of them. My kids suffered terrible asthma *until* I started smoking. I have a friend who has terrible asthma and has discovered that a cigarette handles her worst attacks better than her inhaler. She keeps a pack around just for such occasions. All but one blood member of my family smokes and *none* of the smokers have had a smoking-related problem. The only non-smoker hold-out has had serious health issues.
The dangers are real, but they are seriously over-hyped. I'm sure your granddaughter is not in danger if her mother smokes at the other end of the house.