Black Sandy Beaches

In this i believe ms. leading is reading the letters or "the message in the message that I sent" from whoever the narrator is (casey most likely). at first she doesnt realize they are to her but then she does and is devastated because only now does she realize how much he loved her "Oh how she cries from vicarious pain from the one he writes about" this is when she realizes its about her. But she is better off without him