Shutterbug, (and anyone else reading this thread).....
RUN don't walk to your wife's GYN. Loss of sexual desire after menopause is NOT normal and can be an indicator of hormone imbalances.
I have known women who cannot explain why they have no sex drive at a time in their life when they should be spontaneous and free, for obvious reasons. (Hello!!! no periods, no pregnancies, etc)
They can be fine with a testosterone injection, and I have even seen women turn into roaring tigers who've "gotta have it."
I fell bad for you because it seems you really don't know much about women's physical and emotional makeup, which could be another part of the reason the faucet has been shut off, quite frankly.
Perhaps an honest and open discussion with your wife's GYN provider will restore her desire to have sex with you. If, that is, you're someone worth having it with!
----------->running for cover.....