If your fiancee really can't stand the smell, maybe try one of these?
http://www.smokebuddy.com/
Has she smelled the difference between vapor and smoke yet? I also think the Solo is a pretty low-smell vape. Another big difference between combustion and vaping is that the smell from vaping doesn't linger. When I used to combust, I could leave the house for hours and still smell pot when I got back. My wife knew when I would smoke because she could smell it on my clothes. Now that I vape, I never come back to evidence of my activities, and she never comments on the smell of them. The portables I owned that I felt were smelly, or that my wife commented on the smell, were the iolite, Pax, and Firewood (my wife asked me not to use it in the car--she was driving--because it smelled too much). I have used the Pinnacle Pro in the passenger seat, with the window cracked, and she has never said a word about it. (Granted, she's not particularly naggy, so I'm not saying there's NO smell...just not enough to bother her).