Why did M. Loisel expect his wife to be pleased to receive the invitation from the Minister of Education?

M. Loisel expected his wife to be please because she consistently complained that she wasn't invited to such gathering and dreamed of them regularly. He expected her tp be please because she rarely went out.

When she sat down to dinner at a round table covered with a three-day-old cloth opposite her husband who, lifting the lid off the soup, shouted excitedly, "Ah! Beef stew! What could be better," she dreamed of fine dinners, of shining silverware, of tapestries which peopled the walls with figures from another time and strange birds in fairy forests; she dreamed of delicious dishes served on wonderful plates, of whispered gallantries listened to with an inscrutable smile as one ate the pink flesh of a trout or the wings of a quail.

"But, my dear, I thought you would be pleased. You never go out, and it will be such a lovely occasion! I had awful trouble getting it. Every one wants to go; it is very exclusive, and they're not giving many invitations to clerks. The whole ministry will be there."