Lawyers have the professional obligation to avoid improper relationships or forgo the attorney-client relationship altogether. There is no way to have both.Members of the State Bar of Texas have rejected a proposed change in the ethics rules that would have barred sex with clients. No. INCREDIBLY unethical? Competent and Diligent Representation. 10. Rule 1.06 - Conflict of Interest: General Rule (a) A lawyer shall not represent opposing parties to the same litigation. The American Bar Association's Model Rules of Professional Responsibility prohibit such affairs between a lawyer and his clients. A lawyer should not accept representation in a matter unless it can be performed competently, promptly, and without improper conflict of interest. Yes generally you should as clients have a right to their file however, consult a Texas ethics and professional responsibility attorney. This rule ensures clients can share sensitive details without fear.