At 3:15 p. m. on December 12th, Delores telephones Gloria to set up a tennis date. Gloria's husband Frank answers the phone and Delores asks to speak to Gloria. Frank says: 'Gloria's not in the apartment right now, I'll have to ask her to call you back.' At precisely the same time across town, a woman driving a black Mercedes runs a red light and strikes a young child, killing him. The Mercedes drives off without stopping. An eyewitness is able to read the first three numbers on the license plate, and the police track the car to Gloria, who owns a black Mercedes with the same three numbers on the license plate. Gloria is prosecuted for vehicular manslaughter and leaving the scene of a fatal accident. At trial, Gloria's attorney calls Frank to the stand. Frank testifies: 'I was home all day on December 12th, and Gloria was with me there the whole time.' On cross-examination, the prosecutor asks Frank whether he ever told Delores that Gloria was not home. Frank denies making the statement. The prosecutor then calls Delores, who will testify about Frank's statement to her on the phone. The defense objects to this proposed testimony. What is the proper ruling