Madame Loisel wishes to have an expensive for the reception. What does her husband giving 400 francs reveal about the values of Madame Loisel and her husband?

I think her husband lives within his means. He, however, feels guilty that his wife is so unsatisfied. He wants to indulge her if only for one night. Madame Loisel is lost in the illusion that looking wealthy will somehow give her the external validation she craves. Their values are very different.