How long do employment contracts/confidentiality agreements last?

I have a friend who worked as a long-term temp for a rather unethical lawyer. She never signed a formal employment/confidentiality agreement, just signed a temporary employment agreement. Recently, she was subpoenaed by another lawyer in a suit against her former employer about the way he conducted his business and his billing practices. The judge overruled her former employers objections to her testimony, stating the employment agreement that he says he has a copy of (the name is typewritten over a whited-out name on the copy). The judge states that this wasn't a violation of the "agreement" and she could testify. Now, this former employer is suing her for breach of contract. I worked there as an executive secretary for a week and a half, and quit asap. I signed a confid/employ agreement which I have not violated. My fear is that I will be somehow dragged into this mess being that I recommended her for the job in the first place. Is my contract still valid or can I be sued 2?