Did you see, hear or read anything about the recent congressional hearings for the arrogant IRS agents? They basically told their side of the story and refused to answer any questions.
And there's nothing bad about that, if she's under oath check out her story and if it doesn't pan out: perjury.
There's many other ways to handle things; saying that they made a statement or answered some questions invalidates their 5th Amendment completely overlooks the self-incrimination aspect. What if, for example you were defending in court and after answering some questions were asked when did you quit beating your wife?
— there's no way to answer that w/o incriminating yourself (unless you attack the premise).