He hesitates, not sure how to proceed. He wants to push more, get more information and find out just how neglected she is. She seems perfectly well-adjusted but he still can't help but worry.

"...Tim, I'm really worried you're going to get hurt, and if you're out and about and you get hurt your parents aren't going to know about it, so it's really dangerous," he explains to her, as seriously as possible, "If I promise to come visit you, can you promise not to come looking for us again?" This way, he could keep an eye on her situation.