Anonymous wrote:Floss/waterpik, tongue scraper and check for tonsil stones. You need to tell her.
NP. Agree. OP, she may not take things like this well, as you note, but if YOU smell it, others smell it too. If/when she goes back to an office to work or gets out more or goes back to....PTA, activites, whatever, this is going to be noticed and someone may tell her in a less kind way than you would.
I would approach it as "maybe there's a medical or dental issue" and go from there. Do the things above for sure too, but when was she last at the dentist? Do you share the same dentist/hygenist and if so, do you know them well enough to call and prep them to talk to her about halitosis or health reasons for bad breath? I know our shared dentist and hygenist well after 30 years and if I called them and said DH had awful breath and could they talk about it without bringing me into it -- as if they noticed it themselves-- frankly, they'd do that. Can you try it? Or does she also refuse to go to the dentist?
And look up how bad breath can be a symptom of a LOT of different issues like digestive problems and more. Your DW might shrug and say "it's just wine breath" but the health angle is maybe a way to push her to hear from a professional that her breath stinks. And, well, it really could be a health problem that needs diagnosing.