Welcome to the ECF Jerpal.
The flavoring can be the culprit. I'm sensitive to many smells, just a whiff of even a lightly applied perfume can cause me to cough and give me a headache.
Have your wife try a different flavor, or, as already suggested, try unflavored.
Wouldn't hurt for you to try it too. Might just be what you need to get you
vaping!
