By the fourth of July, the narrator confesses that the wallpaper starts to grow on her. This admission confirms the fact that her mental well-being is declining. That is why John threatens her making an appointment with another doctor.
Detailed answer:
The Yellow Wallpaper of Charlotte Gilman is a short literary work. Still, it regards many hot-button issues through the story of a woman’s descent into psychosis. The main character sticks to rest cure with her family in the countryside. Her husband’s name is John, and he is her doctor at this challenging time. Her deterioration was expressed in the obsession with the yellow wallpaper in the bedroom.
By the fourth of July, the narrator almost becomes insane due to the object of her obsession. She does not fall asleep during the entire night as she stares at it. The main character strongly believes that the wallpaper will become alive, and the patterns are going to change and move. She is convinced that there is a woman inside the wallpaper. The woman is “ behind the pattern”. The narrator confesses to her husband that the object of her obsession is growing on her. John is appalled, as this fact implies the deterioration of the wife’s condition.