How many employees does this company have?
Also, how is she "trying to sue" the owner and the corporation? Have you received a letter from the EEOC? From an attorney? An official notice of court date?
When did this employee leave your company? What was the reason she gave at the time? How long was she employed there?
Sorry to bombard you like this but we need the answers to these questions in order to form the best advice we can for you.

