She does what her parents tell her to do, she does not have a mind or opinions of her own that hold sway, she cannot communicate well what she is feeling, she cannot reason nor can she find solutions to situations that appear black and white and are not (as we adults know).
Really, there is no doubt. She may be the age of a woman, fit in adult clothes, but she is mentally a child. And I don't mean that all derogatorily.
Hopefully, she reaches puberty in the next couple of days--rebels, lusts after Karan, and throws a fit at whoever stops her from doing what she wants! 😊 😉