4 ideas
The girl narrates this flight from inside it, and the reason they are running is withheld and only gradually revealed. The novel's original Turkish title asks the question the whole book turns on: 'Who were we running from, Mother?'
When two people define themselves as allies against everyone else, each outside contact looks like a threat, so the bond grows by cutting off every alternative source of meaning. The child gets her whole reality from the adult. That dependence then makes the adult's fears feel like established fact rather than one person's view.
A child who has known no other life reports extreme arrangements in a flat, matter-of-fact way, because she has no baseline to measure them against. The reader has to reconstruct the true situation from the gap between what she describes and what she fails to find strange. That gap is where the story's meaning is carried.
Moving on keeps resetting every relationship to zero. Motion itself then becomes the way the isolation is maintained, not just a way to escape.