This is Volume 5 of Proust's In Search Of Lost Time. The Narrator is living with Albertine in his family's apartment, to Françoise's distrust and his absent mother's chagrin. He marvels that he has come to possess her, but has grown bored with her. He mostly stays home, but has enlisted Andrée to report on Albertine's whereabouts, as his jealousy remains.
Really this is the worst volume in In Search of Lost Time. It's the first that Proust did not do the final edits because he died before it was published. But the main thrust of the volume is his obsession with and how he kept Albertine "captive" in his apartment. And what an immature, neurotic take on love: if you possess someone, love dissipates, if they leave, love flourishes. I will finish the 7 volumes but I can't say I'm in love with Proust.