If you and she are happy together, enjoy the ride. Just be careful that she isn't after cash more than your studly good looks.
Regarding GOP Poet's "men as they age want to date women as young as they can get--mainly as an ego feed":
Men are designed to be attracted to healthy, fit women in their prime child-bearing years, which happens to be 18 thru 30. Women in this age range can give them children, and are young enough to deal with raising them.
Women are designed to be attracted to men who display competence and fitness, because women who are pregnant or who have young children need somebody to protect them and provide for them. Somewhat older men are acceptable because, in primitive times, a man who has managed to survive into mature adulthood is unlikely to be a complete ditz.
I was however quoting a study. Not my own opinion. Who wouldn't want the prettiest parcel on the block?
At some point men want an excellent combo of what they want that best serves them not what he world tells them to want. I don't have to tell you that though as you are a man. :).