we have never allowed smoking in our home but we do have pets- i try to keep our cat at a distance...but...
i always wash finished projects- if it is a quilt to be sold i then fold it and put it in a pillow case to keep it clean until it goes where it's going- I do let people know we have a cat-
normally the quilts i sell are special orders and it is known that we have a cat.
we have a niece who is very very allegic to our cat- when we make anything going to their home it is placed in a plastic garbage bag-labeled very well- they take it directly to their washer/dryer- even if i had just washed it----they know we have the cat and take no chances- we know this.
long & short-
you should always let it be known if selling (or even giving) that there were pets- or smoking- or anything else that tends to cause reactions--so customers can make decisions they can live with.