4 ideas
Mariana, a roughly ten-year-old Lisbon girl who has been an only child, narrates in first person the months after her parents bring home a baby sister, Rosa. She moves from resentment and feeling displaced, as adult attention and household routines reorganize around the infant, to a grudging and then real attachment. Along the way she sees her parents' tiredness, arguments and limits for the first time.
An older child's hostility toward a newborn is less about the baby than about losing a place: exclusive attention, being the youngest, being the center of family talk. It fades when the child finds a new role and gets real, specific attention that confirms she still has a place.
A household disruption like a birth strains the adults enough that the child sees behind the parental role. She sees fatigue, impatience, marital friction and uncertainty.
Realist children's fiction gains its force by letting a child narrator voice jealousy, meanness and confusion without an adult voice correcting or moralizing. When the child's point of view is taken seriously on its own terms, young readers recognize their own emotions as legitimate. Growth then comes through lived episodes rather than stated lessons.