What does Elizabeth confess to her husband? How does John react to this?

Elizabeth confesses she is not without sin, and that she takes responsibility for her husband's lechery. John's response is to tell Hathorne his decision is that he wants his life.

Elizabeth: Do what you will. But let none be your judge. There be no higher judge under Heaven than Proctor is! Forgive me, forgive me, John - I never knew such goodness in the world! She covers her face, weeping.

Proctor turns from her to Hathorne; he is of the earth, his voice hollow. Proctor: I want my life.