I see this is an unpopular comment but that happens.
My girlfriend was a smoker when I met her. She stopped for a time, but took it up again when visiting family.
She won't stop for me, but says she will try again on the date of her father's death.
She has four brain aneurysm but still smokes away.
On the plus side it keeps me busy and creative maintaining a system of smart switches, thermostats, motion detectors etc to run positive ventilation or vacuum when she enters the house or the smoking room.
It's just hard knowing that even though you're married, you take second place to a dead father and a pack of cig's.