A very rich merchant from St Denis, had a beautiful wife and a splendid household. His wife liked to buy fancy clothes and to organize parties, one of their favorite guest was a monk.
One day, the monk came to their house, found the wife alone and complaining about her husband who didn't want to give her one hundred franks to buy a dress. The monk wanted to help her and she knew it. She told him that she would show her gratitude if he could find her the amount of money. The monk promised her to do it.
Ask your wife
I want my money back
Few days later, the merchant had to left the town for a business trip, the monk asked him a loan of 100 franks. Obviously, the merchant accepted to help his friend.
Where is my money????
After the departure of the merchant, the monk went to see his wife and she proposed him to spend the night with her in exchange of the hundred franks.
When the merchant came back from his trip, he went to the monk's abbey to get back his money but the monk told him that he already repaid his wife few days after he borrowed it.
When the merchant came back home, he asked his wife about the money, and she told him that she spent it all in clothes