I don't know if this will apply to your situation or not.

My next door naighbors: mom, dad and 22 year old son are chain smokers. 12 year old son is anti smoking. But every time he comes over, he reeks of cigarette smoke. Enough that it makes me cough. He knos and he feels very self conscious, even when he goes to school. He tries to take his clother out of the dryer, put them on and leave the house, just so he won't carry the smell with him. That is a tough thing for a 12 year old to handle. I just hope he doesn't succumb to second hand smoke and become addicted himself, and start smoking in a few year.

I can't go visit them in their home; the smell is in the fabric of the sofa, the uphostered chairs, the curtains.

The mom and dad did quit about 4 years ago, for almost a full year. Then the grandpa died (mom's father). And they both started up again because being with the family for the wake, funeral, tending to each other and to the new widow, well, ALL that extended family are smokers and it got them both started again.

Quitting is NOT easy. Staying away from it is hard after you quit, too.