how does othello respond in act four scene two

In Act IV, Scene II, Othello still swears, after speaking with Emilia, that Desdemona is "a subtle whore"; the irony is that Othello takes Desdemona's piety and goodness as proof of the corruption lying beneath the surface, when these traits are as straightforward as possible. His words still condemn Desdemona, and Emilia too; Emilia is a "bawd," and the mistress of the whorehouse of which Desdemona is a part (IV.ii.20-21). Othello believes that Desdemona's denial is a sign of her deep-seated betrayal; but it is really a function of her honesty, and she has committed no wrongs.