Dorothy Wilson

 is the wife of Keith Wilson, an advertising agent at McMann & Tate. They take their daughter, Lisa, to stay with the Stephenses while they go out of town to land an account. Prospective client, Mr. Brockway, sees Lisa at the Stephenses' house and mistakenly thinks that she is Darrin and Dorothy's daughter. Because he believes that Darrin is in an interracial marriage, he wants Darrin off the account, deeming him "unstable".