The Revolt of Sophia Lane

This is a short story about the spirit of giving. It tells the story of Sophia Lane and her niece, Flora Bell. Floral and Herbert Bennett are planning to marry. When Sophia's second cousin, Mrs. Adoniram Cutting, her married daughter Abby Dodd, and her unmarried daughter Eunice, who have driven over from Addison with their wedding gifts, arrive on the humble scene of triumph and happiness, Flora is invited to unwrap the gifts that the Cuttings have brought her. But Sophia Lane revolts against it. Why did Sophia Lane revolt against the gesture and gifts from the Cuttings?