Yes. Since both realities are equally possible, both exist until they collapse down to only one, when someone finally opens the box and observes.

[She sighs, and takes a moment, one more time. She doesn't talk about this, ever. Even with Aoi, really. Its referenced, but they rarely ever actually talk about it. It hurts them both too much.]

Do you remember what I told you a little while ago? That I was kidnapped when I was 12?