Something that a lot of other students, and professors, mentioned that they have learned was this idea of "catharsis" in Greek theater. How important it was to include it in their writings, and how they pioneered this idea and really got to create it. I think this line is a great example of emotional catharsis for the audience. A woman has killed herself out of guilt, sadness, disgust, or a combination, and yet- we feel relieved. Relieved that she does not have to live with this vile truth of her wedding and having kids with her own son. It allows the audience this emotional catharsis of her release from this life, and a feeling that she knew it was wrong.