i'm totally going to get attacked for what i may say.
if she is using zero nic, likes the ecig, then i see no harm.
we all need some type of support, if she doesn't have an issue with it then nobody else should.
my female friend doesn't smoke but when we go out to the bar she loves to hit my caramel flavors that do have nic in them.
your wife is her own person and can make her own choices.
i wouldn't say "do this to help me".
the real question at hand is, what is it that you are missing from cigs that you arent getting with your ecig, causing you to keep smoking them?