Michael G. Miller's essay "Browning's 'My Last Duchess'" discusses how the Duke unknowingly reveals his enormous ego as he describes the painting of his last Duchess. The underlying theme is the Duke's dark secret of possessive love, obvious jealousy and resentment towards his belated wife. Miller argues that looks can be deceiving and what someone says and what they really mean is often not the same.
Miller points out that the audience is mislead to believe that the Duchess was simple-minded and unfaithful. The misrepresentation of the Duchess begins when the duke explains what brought about the "spot of joy" on the duchess's cheek in Fra Pandolf's portrait. The Duke admits "'t was not / Her husband's presence only" (lines 13-14) caused her to blush. This statement is true but its phrasing leads to misunderstanding. The Duke tries to make it seem that "The presence of men other than her husband," caused the blush but that is not the case. When he later reveals his wife was easily amused, one can clearly see that "not her husband's presence only" really means "The presence of many delightful things" brought about the Duchess's blush. He allows the reader to take the statement in its negative form according to Miller.
The negative implications of the duchess are accentuated in