Why does the narrator of lock her husband and Jennie out of her room?

In "The Yellow Wallpaper," the narrator locks her husband, John, and Jennie out of her room as an act of rebellion against the oppressive treatment she experiences. She feels trapped and misunderstood, as they dismiss her concerns about her mental health and impose their own beliefs about her recovery. By isolating herself, she seeks autonomy and the freedom to express her thoughts and creativity, which are stifled by her confinement and the "rest cure" prescribed by John. This act symbolizes her struggle for independence and her desire to reclaim her identity.