I was in a similar situation. If your sex life is as good as you say, just bop on down to your corner sex shop and buy a vibrator. Get one of the more subdued, generic variety, you know the kind that look like plastic lipsticks. Then surpise her with it the next time you have sex. Use it telling her and showing her how much it turns you on. Trust me my friend, she'll love it. My wife sure did!

__________________
"Even a man who is pure of heart
And says his prayers by night
Can become a wolf when the wolfbane blooms
And the moon is full and bright."