Why did Ellen make a sharp cry when she went outside with Uncle Henrik?

Ellen made a sharp cry because when she got outside her parents were there waiting for her.

Ellen was still outside. But in a moment the door opened and she returned—held tightly, like a little girl, her bare legs dangling, against her father's chest. Her mother was beside them .

Why did Ellen make a sharp cry when she went outside with Henrik? (Chapter 9)

Ellen made a sharp cry because her parents were there waiting for her.