She is sexy as hell. Hope she gets there for you. I'm in the same situation. Hot wife who is hesitant for some reason. Nothing would turn me on more to see her get what she needs. Good Luck!
She was blessed by nature with that body to enable her to attract and pleasure her choice of males and should certainly avail herself of that biological gift. If you two share in the experience together you'll not only both enjoy it immensely, but it will bring you closer as a couple.