How we cite our quotes:
"Here, child," said Mae hastily. "Hide your eyes. Boys? Are you decent? What'd you put on to swim in? I got Winnie up here, do you hear me?"
"For goodness' sake, Ma," said Jesse, emerging from the stairwell. "You think we're going to march around in our altogether with Winnie Foster in the house?" (10.14-15)
Aw, the Tucks are so old-fashioned. It just wouldn't be right to be indecent in front of a stranger. Oh wait, we guess that's not really all that old-fashioned.
"If people knowed about the spring down there in Treegap, they'd all come running like pigs to slops. They'd trample each other, trying to get some of that water. […] [C]an you imagine? All the little ones little forever, all the old ones old forever. Can you picture what that means? Forever? […] they wouldn't know till after, and then it'd be too late." (12.11)
Tuck has a moral responsibility to keep the spring a secret. After all, he can guess how terrible things would turn out if everyone knew about it, and he needs to protect the people who aren't quite yet in the loop (i.e., everyone).
And all at once she wondered what would happen to the Tucks when her father came. What would he do to them? She would never be able to explain how they had been with her, how they made her feel. She remembered guiltily that at supper she had decided they were criminals. Well, but they were. And yet… (14.23)
Winnie is feeling guilty that she thought kidnappers were criminals. Hmmm. That makes us wonder: do our morals change when we're thinking about our friends as opposed to total strangers? That sure would explain Winnie's sudden change of heart.