Answer: He is buying an invitation to a ball
Step-by-step explanation:
Mathilde had worked as a clerk and she always wanted luxurious life. Her husband really wanted to please her because he was a kind man that loved her very much.
He had bought an invitation to a ball to make her happy and after that Mathilde was still unhappy because she wanted to have a new dress and jewelry. Her husband was always supportive and kind, but she was very greedy.