[@pyroman]
I know some certain substances will not mix well if it comes into contact with Eve's gemstone (eg; alcohol, gasoline) as these substances (or the substances within these substances) dissolve evenkite, but I don't see there being a problem with cigarette smoke since the amount of benzene is very, very small. We're talking micrograms. For that matter, since Eve's third power is typhogenesis, she'd probably be pretty curious about them.