I believe your wife.  I have a girlfriend that I hadn't seen in years. Was able to spend some time with her last summer.  She has been a non-smoker for about 8 yrs and was 
thrilled and interested in my pv.  She was happy for me that I had dumped cigarettes.  About 2 days into my visit, she ask me not to 
vape if she was in the room.  It was bothering her.  I believe her because she was so happy for me and supportive of my 
vaping.  
I just stepped into the next room and vaped.  Then she was fine with it.  She was unable to explain to me exactly what was bothering her when I vaped.  But it bothered her. I believed her and immediately corrected the situation. 
Paula