La Cousine Bette is an 1846 novel by French author Honoré de Balzac. Set in mid-19th century Paris, it tells the story of Bette, an unmarried middle-aged woman who plots the destruction of her extended family. Bette works with Valérie Marneffe, an unhappily married young lady, to seduce and torment a series of men. The book is part of the Scènes de la vie parisienne section of Balzac's novel sequence La Comédie humaine. In the 1840s, a serial format known as the roman-feuilleton was highly popular in France, and Balzac wanted to prove himself the most capable feuilleton author in France. Writing quickly and with intense focus, Balzac produced La Cousine Bette, one of his longest novels, in two months. It was published in Le Constitutionnel at the end of 1846, then collected with a companion work, Le Cousin Pons, the following year. The story explores themes of vice and virtue, as well as the influence of money on French society. Bette's relationship with Valérie is also seen as an important exploration of homoerotic themes. La Cousine Bette is considered Balzac's last great work. His trademark use of realist detail combines with a panorama of characters returning from earlier novels. Several critics have hailed it as a turning point in the author's career, and others have called it a prototypical naturalist text.