I suggest that you both check out the videos and commentaries at http://www.ifeelmyself.com
. Although they're not specifically educational, the videos are tasteful, candid and beautifully presented, and the commentaries are insightful. A few years ago, they played a significant part in convincing my wife that masturbation is "okay" -- natural, delightful and something that normal, good girls can enjoy.
Hope that helps! Good luck!