Q: Dear Ethics Lawyer, My firm has represented a wealthy family in estate planning matters for many years. In addition, for at least 25 years, the firm has represented a business owned by family members in a variety of general business matters for which time has been billed to a general file in the company’s name. The business has been in decline, and time was last billed to the company’s general file about a year ago, but the general file has never been closed. Can the firm now undertake an action adverse to the company if the substance of the action has nothing to do with any prior representation?