This is another amusing little bagatelle of a story. On one hand, there is the ultra-responsible ultraist the Marquise de Listomere, who goes to confession and communion regularly as she waits for her dullard of a husband to move up in the ranks under Louis XVIII.
On the other, there is our old friend, Eugene de Rastignac, who toys with the idea of toying with the upright Marquise when he meets her at a party. When he returns home, he thinks hot thoughts about her under the sheets. When he awakes, he writes two letters, one to his lawyer and the other to his current inamorata, Madame de Nucingen.
At least, that’s what he thinks he does. Except that his provocative little billet-doux is actually addressed to … the Marquise de Listomere. Now here’s a pickle if there ever was one!...