Outside the chamber Evadne's maid Dula jokes bawdily with her mistress, but Aspatia cannot join in the banter and announces she will die of grief, taking a last farewell of Amintor when he enters. Left alone with her husband Evadne refuses to sleep with him and eventually reveals that the King has forcibly made her his mistress and has arranged this marriage to cover up her ‘dishonour’. Amintor is horrified, but agrees to go through with the charade of pretending to be a married couple. He sleeps on the floor. Aspatia is talking with her maids, advising them never to love. One of them has produced a tapestry of Theseus and Ariadne, a suitable theme for Aspatia's plight. Calianax enters and is angry at the situation, breathing threats against the men of the court. The morning after the wedding night some male courtiers are talking bawdily outside the chamber and are joined by Melantius. Evadne and Amintor emerge and continue with the pretense, but Amintor is so distressed he says various strange things and Melantius and Evadne notice. The King and courtiers enter and he quizzes the couple; Amintor's answers are so smooth that the King grows jealous and he dismisses everyone except Evadne and Amintor. He satisfies himself that the couple have not slept together and he lets Amintor know the rules: he is to allow Evadne to come to him whenever he wants and is to stay away from her himself. Melantius enters and quarrels with Calianax again; after he leaves, not daring to challenge Melantius, Amintor enters and Melantius gets the secret out of him. He dissuades his friend from revenge and counsels patience, but once Amintor has left he begins to plot to kill the King. In order to do this he has to have control of the citadel which is governed by Calianax. The old man enters again and Melantius proposes common revenge for the injuries that the King has done them both, but after he leaves Calianax resolves to go straight to the King with this information. Melantius goes to Evadne and forces her to reveal what has happened. He gets her to promise to kill the King. He leaves and Amintor enters, Evadne apologises for the situation, but doesn’t reveal she is to kill the King.