In terms of discretion, she's been Charles' partner for more than two decades. I don't think I've ever heard her voice. Yet she appears on the news all the time, gliding past the cameras at one event or another.
Wouldn't it be luverly if she finally spoke, and she had the mouth of a fishwife.
http://www.youtube.com/watch?v=f_6wOKJG_ZA