She's simply not ready to quit smoking. Period. Her bravado about how, if she does it, it'll be "cold turkey" is just bluster. She has NO intention to quit, and until she's ready, she isn't going to do it. No amount of talking, guilting, nagging, complaining, reason, or logic is going to change her mind. I know. I used to be there. I even got divorced when I was in my 20's IN PART due to my smoking. My ex-husband smoked when I met him, smoked when we married, and continued to smoke for several years after that. Then he quit cold turkey and suddenly I was a piranha, a leper. A disgusting, smelly, ignorant fool that he didn't want anymore. But the more he carried on about it...the more I smoked. That and him finding a non-smoking girlfriend put a kibosh on that marriage.
It took me another 33 years or so to quit. And that was with e-cigs. Yes, I tried a few times with patches and gum and even Wellbutrin and whatnot. Got the ration from my kids about how I "needed" to quit. Big shows of spraying down their clothes with Febreeze every time they went out the door to go somewhere. But I couldn't do it. I'd look up things to try to find a way to do it..but nothing clicked. And nothing I did try worked. Until e-cigs.
After 43 years of smoking heavily I found
vaping, and it "took" immediately. Haven't touched a cigarette (other than to
throw them out) since Sept. of 2011. I talked to my present husband who smokes about trying and and he was willing...but he didn't have his heart in it, and ended up smoking for another 9 months before he made up his mind to commit. He's been smoke free now since last June.
I knew better than to complain about the smell when we was smoking. I knew how
I felt when people nagged and complained to me. So I didn't say much about it, even though it had started to bother me. I didn't really mention it, or complain. I just kept
vaping. And talking about vaping. Husband was bragging on me about how I'd quit smoking when NO one in the family thought I could do it. Finally one day (after I bought him an X2) he just stopped smoking. He had to be ready in his own mind. No one could make him take that step but him. Just as it had to be MY decision when I quit.