Diet to quit smoking

I'm just wondering something. I saw that your wife smokes ... do you think that makes it harder to quit?

I have a friend that tried to quit but his wife kept smoking. He eventually went back to smoking so I was just wondering if that has anything to do with it? It could be the other way around also ... the wife quiting and the husband keeps puffing. I've never experienced first hand because I never smoked but have always wondered if that a influence?

what you think?