You just kind of have faith. If that sounds kind of mystical, it's because I really don't know how it works, but I trust that it does. I try to write the way I read, in order to find out what happens next. ↗
To get a child's trust - you may know or not - is a very hard thing to do. They're so used to not believing adults - because adults tell tales and lies all the time. ↗