My mum, now in her 50s, has been a heavy smoker as long as I can remember. I was embarrassed by it as a teenager because my school uniform always smelled smoky, and people would make comments at school (none of my friends parents smoked then, and actually my DM is the only person I know who smokes to this day). I've never been a smoker myself and I can't stand the smell of stale smoke.
DM knows I dislike it and makes a point of smoking outside when I visit her (she lives alone). But it's really obvious that she smokes indoors the rest of the time. The smell of smoke hits as soon as you walk in the door. Every room smells of it, even those she doesn't use and definitely doesn't smoke in, such as the guest bedroom I sleep in. When she buys gifts, I have to wash them before use because they smell. When I visit her, I have to shower soon as I get home and wash everything I've taken into her house, the smell is so strong (DH avoids visiting her now because he hates it too, and won't come near me until I've showered after a visit). She herself smells very unpleasant, despite trying to mask with gum and perfume.
I'm about to have my first child, her first grandchild, as I'm an only child myself. She's very excited and I know she's picturing the kind of relationship she had with her gran and I had with mine - sleepovers at hers and quality time together just the two of them. And selfishly, I hope for the same thing, so that DH and I can catch the odd break and enjoy time together! But, I really hate the idea of my child going into a smoky environment, both for health reasons and the practical/aesthetic issue of everything being smelly and needing washing after every visit.
DM clearly doesn't realise that it smells and is "noseblind" to it; if she did, she wouldn't bother to go outside to smoke in my presence, and she obviously thinks she's being courteous to me by doing so. I'm sure she would do the same when her grandchild visits. But the problem isn't the fresh smoke, it's the embedded smoke. Would it be unreasonable for me to tell her how bad she and her house smells, and to request that she puts a stop to indoor smoking altogether, as a condition to have her GC in her house? (And if any MNetters agree this is fine, advice on how to handle it sensitively would be appreciated!).
YANBU - a smoky environment is horrible and not suitable for a child.
YABU - it's her house and she's entitled to smoke in it if she chooses.