I can only vape one particular e-liquid inside our home, otherwise my wife goes ape shit and even then i can only really vape in one room. she has allergies to many smells, chemicals, food. I would hazard a guess that my wife became desensitised to the smell of my vanilla custard, whereas with other liquids/ flavour profiles she picks up on it straightaway, even one puff will set her off. Maybe you can find one particular liquid that your GF can adjust to and get used to.
With regard to clouds/ vapour lots of people automatically start coughing when they see it, almost like a put me down, telling off. An irritated throat could be the sensitised/ desensitised thing, it might also mean that you might have to not vape indoors or only vape in one room, with the door shut. Personally I don't like the smell of other people vaping fruit liquids/ fruit flavour profiles, they smell proper rank to me.