A picture caught of a moment in time with a strong wind blowing and a figure like Jenna Bush's could change the impression of a demure and attractive pastel shift.
I don't know anything about Barbara and Jenna other than what I read, see, and hear from a media that is bent on presenting a certain image of them. I'm betting your daughter wouldn't fare any better if she were President Bush's daughter. I have every confidence that the media guys and gals could have folks questioning her morals, character, fashion sense, etc., in no time flat.