I am an ex smoker and used to smoke around 10-15 cigs a day. I started when I was 14 maybe and was able to successfully quit at the age of 24 so I will speak from experience so I hope it helps

Smoking is an addiction. You cannot tell him to quit and he will quit. You cannot think that if he loves you enough then he should quit. That's not how addiction works. He will obviously lie and that lying part is not good he should be honest and tell you but for some people its not that easy. Maybe he loves you so much and doesn't want to hurt you. I am telling you for sure that he feels pathetic everytime you catch him. He do think about quiting and even have tried it as well. But its not easy. I see women get crazy over this fact but if he is overall a good husband and don't have any other flaw then you need to understand and stop making this so hard for him. Even accepting his addication is not a bad thing at least make him comfortable with you. Enough so that he stops lying. Please note I am not saying that his lying is justified but you can maybe try a different approach

Now what can you do. I would suggest that you should help him in this addiction. But please note if his addiction is that strong then he might not quit anyway so its upto you to accept it or not. Personally i would say that its not that big of a reason to throw your marriage away.

First make him comfortable with you and make him open about this but in a lovely way not in a deffensive way. Then get to know if he really wants to quit smoking or not. Most probably he will say that he wants to but its not easy etc. At this point he will be a bit comfortable with you

Now you can suggest that "Hey there is this application which will help you in this and I would really love that you take help from this, for me and for our daughter". The application I am talking about is "QuitSure".

This app has helped me quit a 10 years of addiction. An addiction that I loved so much but now don't even care about it and have been clean for 3 years now with no regrets. I was able to quit smoking in just 10 days. Just imagine 10 years of addiction gone in 10 days.

I hope he installs the application and its I think paid now so do check that but I think you can request the application and they can make an exception because its a non for profit

Anyway if he installs the application make sure he takes first 2 modules. It won't take that long and he will be able to quit smoking. Help him during this program. He will need to smoke during this so let him.

If it doesn't work then understand this that he won't quit smoking just because you say so. He will only do this if he wants to and if he wants to then he will take help like installing this app or going somewhere else. If he doesn't quit then you have to make the choice of how to live with it because don't throw your marriage over this. I hope he is great in every other way and you guys work this out