When her husband returns he finds a very different woman waiting for him and is too startled to express his feelings before she admits that she made a mistake accepting their passionless marriage, and leaves him.
He finds a very different woman. This very different woman is waiting for him. He is too startled to express his feelings. She made a mistake. This is what she admits. She was accepting their passionless marriage. This is what she admits. He leaves him. Her husband returns.