Keeping in mind the ending of the story, which best describes the irony of Mr. Shiftlet's statement?

Instead of experiencing the joy of gaining a son-in-law, Mrs. Crater feels the sorrow of losing her daughter. Mr. Shiftlet has just deceived an old woman for personal gain, and yet he does not think he's part of the "rottenness of the world." Instead of experiencing the joy of gaining a son-in-law, Mrs. Crater feels the sorrow of losing her daughter.