Jesse, Miles, and Mae Tuck take Winnie back to their house.
In chapter five, Winnie decides to give her running away idea a test run. She decides to go alone into the woods near her house. Once there she stumbles upon a boy drinking from a little spring by a tree. That boy is Jesse Tuck. Jesse does everything he can to stop Winnie from drinking from the spring, and he is about to fail when Miles and Mae show up. Mae quickly grasps what has happened, and together the three Tucks gather up Winnie and begin taking her to their home a few valleys over. Winnie is sure that she is being kidnapped, but she also feels like the Tucks are being way too nice for it to be a true kidnapping. The Tucks explain on the way to their house why they had to take Winnie. They had to get her away from the spring to protect her from it and explain its dangers.
And Miles said, "We'll explain it. . . soon as we're far enough away."
The trip and the explanation takes several chapters, and the foursome arrives at the Tuck home in chapter nine.