La Fausse Maîtresse (The Imaginary Mistress), also known as Paz, was published in 1843. It belongs to the Scènes de la Vie Privée (Scenes from Private Life) subseries of the Comédie Humaine. It depicts the French society in the period of the Restoration and the July Monarchy (1815-1848).
In the novel, a young Parisian woman marries Count Laginsky, who has a close friend Paz. The woman hears a lot about him during her honeymoon, and finally meets him. When Paz, who is utterly loyal to the count, discovers this attraction, he needs to find a solution to the problem.
One of the few comedies of the great masterpiece of Balzac called Comédie Humaine.