Mich. R. Prof'l. Cond. 4.3
Comment:
An unrepresented person, particularly one not experienced in dealing with legal matters, might assume that a lawyer is disinterested in loyalties or is a disinterested authority on the law even when the lawyer represents a client.
During the course of a lawyer's representation of a client, the lawyer should not give advice to an unrepresented person other than the advice to obtain counsel.