Well, if she's reading that article, it means she's also concerned about it. You don't think she ever masturbates? If she wants to want to have sex, maybe she could look into orgasm tease and denial. If she were to masturbate almost to the point of orgasm, and then stop, and did that two or three times a day, that would get her in a much more sexy frame of mind. But she'd have to want to do it. Not quite sure how you'd bring that up, either.