"Wilson tells Bradley, contrary to reports that many knew Plame was in the CIA, that only he and three other people knew. 'Well, very few people outside the intelligence community [knew she was CIA]. Her parents and her brother, essentially,' says Wilson."
So exactly what level of security clearance did her parents and brother have? Did she 'out' herself to her family? Might they not brag, as many parents do, about having such an important daughter/sister married to such an important man?
Then there is this.