That, being informed of the despair into which I had plunged the man whom she loves to see, she came to beg me to allow her to prevent a departure which would break her heart; to meet this lover to-night under my name, in the little street on which my room looks, where counterfeiting my voice, she may utter certain tender feelings, and thereby tempt him to stay; in short, cleverly to secure for herself the regard which it is known he has for me. (SGAN: And do you think this...) I? I am enraged at it. "What," said I, "sister, are you mad? Do you not blush to indulge in such a love for one of those people who change every day? To forget your sex, and betray the trust put in you by the man whom Heaven has destined you to marry?" (SGAN: He deserves it richly; I am delighted by it.) Finally my vexation employed a hundred arguments to reprove such baseness in her, and enable me to refuse her request for to-night; but she became so importunate, shed so many tears, heaved so many sighs, said so often that I was driving her to despair if I refused to gratify her passion, that my heart was brought to consent in spite of me; and, to justify this night's intrigue, to which affection for my own sister made me assent, I was about to bring Lucretia to sleep with me, whose virtues you extol to me daily; but you surprised me by your speedy return.

Isabella Monologue from The School for Husbands

Rehearse Isabella's monologue