Therapy aside (and without a doubt she should consider talking to someone) Women are complicated sexual creatures who come without manuals or instructions. What works for one may not work for another. If it's an orgasm she wants, it's masturbation she must endure. Only by finding out through trial and error on her own will she find what works for her.
If it is an owners manual you seek try
http://www.comeasyouare.com/index.cf...ksBaking_Women
... and having a supportive patient understanding partner couldn't hurt either I suppose.