She doesn't understand the words but understands enough. Jack is going to run off and explore the land. He keeps going past the markings even though she's tried to explain to him that that's as far as they're allowed. She knows Jack follows her older sister but she's not jealous. Kimi's world view is that of a small child, even if she has seen things that should hurt that view.
She gets off Jack and lets him run off, going back to the other children and patiently waiting his return.
Anaba leads Jack deep into the trees to play their game. Her soft laughter gives away her position but stops before he can find her. Her black hair flies between the trees and Jack gets a vies of a soft shoulder or long leg before she's gone again.