I agree with you regarding her husband, but I read the 'tweat' as dripping in sarcasm. But apparently I'm the only one who thinks that to be the case. If she was serious - yes she needs to be fired - but I believe it was just a polite 'FU' to the crazy Congresswoman from South Central.
And IF ( BIG IF ), someone else used her twitter account ( yeah...and Hillary Clinton is a beautiful, kind, truthful, brilliant, caring woman ), then she is even MORE guilty, for allowing ANYONE else to know her info!