Anyone staying with parents/in laws and they smoke? How do ur live with it?

My son and I live with my parents, my dad smokes. I'd say that I'd try to limit the contact as much as possible, but there's no real thing you can do if you live with them. It's not just affecting me, but LO too - I just try to limit the contact that my dad has with my son, especially when he just finishes a cigarette!