C.B.
I would just be honest about it. Say what you stated above: that for yourself you could deal with the smoke-stench (maybe just say smell) even though you hate it too, but for your baby you find it unacceptable. This will only be the first of many times you may have to advocate for your child, and I would put my foot down. The fact that you are visiting should be pleasing to her, you should not have to stay in a smelly house and be subjected to secondary smoke. Good luck.