What if my father-in-law often smokes in front of his son?

Father-in-law can show more movies about the harm of smoking when he is at home.

You can tell your husband privately that smoking is bad for your health, not only for children, but also for adults. As an old man, your father-in-law should always be filial.

Furthermore, if there are relatives like doctors at home, and my father-in-law still listens to this doctor, he can talk to the doctor about him.