Ok,
Lets break this down in to logic....
So, by your definition is set forth " If I watch my dad drink beer, then I will drink to" or how about " If I see my brother ride a motorcycle, then I will to". The logic of association of habbits is really a false logic, one that is often times uses as a scape goat to hide one's true reasons for doing and or not doing (insert item here).
As for helping your wife, she is an adult and either 1 of 3 options will happen....She will go stir crazy and end up sharing in what you've got, She will get an E-cig at <insert nic lvl here> or end up back on the Cigs. So, I'd say that helping her will do two things, firstly show that you care in her personal affairs and life at this moment, and also support her in her times of need. Reguardless of if you quit for one day or 20 years, you still never loose that urge to smoke as it alters the chemistry of the brain (look it up as numerous studies have been done on it).
So, you have a hobby that helped you quit, isn't the joy of being a vaper yourself is to share in helping others stay off the Cigs? Its not a cool kids only club that you've joined in, its a lifestyle, that has saved lives, so share that responsibly and with others that are in need of assistance.
Breaking it off, what the <censored> are you seriously thinking. I mean really, ok so yes she would like to vape, she came to you, and your...I really don't have a good response for that one except I'd not approve of going that pathway. Selling your stuff wouldn't get any other result other then she would still go out and buy an E-cig (sorry to dissapoint but this is the truth).
Help her out is all I'm going to say.
As for what would happen if all my vape gear dissapeared tomorrow, I'd just not vape. Understand that I'd have a pencil, pen...something to chew on, or bubblegum, but I can live without vaping. Its nothing more for me then an enjoyment activity I do.