Ken

While CubanKeith's question certainly was a good one, I think you can tell from the rest of the posts on this thread that the answer was given right off the bat: DON'T FRENCH KISS just to be safe. With over 8,000 members here on OCF, I have not seen one post that any of the caregivers got oral cancer from just kissing their patients. My own experience as someone who has gotten oral cancer not just once or twice but three times yet being the recipient and giver of loving kisses from my wife with no transmission of cancer seems typical.
The vaccine is probably a little late for your wife. There was a flurry of scare tactics & hysteria on HPV & kissing at first on some TV shows, just like at the beginning of the AIDs epidemic. Unlike AIDs, HPV is usually handled by a person's immune system and the lack of any documented transmission of oral cancer thru kissing resulted in no more news stories. That's probably why your doctors never suggested any "treatment" (plus I am unaware of any "treatment" for HPV anyway)
On the other hand, it could not hurt for your wife's gynecologist to order an HPV test of her cervix or pap smear.
In addition to oral cancer, HPV does cause cervical cancer.
Those are my thoughts
Charm