In Act 4 Scene 2, What are two instances in which Desdemona’s innocence and virtue are emphasized in this scene.

Certainly, it is painful to see Desdemona try to understand her husband's fury. Othello goes on about deceit and sexual indiscretion. Poor Desdemona can only say, "Alas, what ignorant sin have I committed?" Othello calls her a strumpet (prostitute) and Desdemona protests her virtue,

No, as I am a Christian.

If to preserve this vessel for my lord

From any other foul unlawful touch

Be not to be a strumpet, I am none.

Indeed, Desdimona is virtuous which makes this scene all the more harder to bear.