It's Bill that's spent the money on his cussed booze and gambling. Way of the Lawless Max Brand The gambling houses can do it, and so keep on breaking the law.
When Winnie tries to drink, Jesse stops her. Then Mae and Miles appear. Alarmed at Winnie's discovery of the spring, they kidnap her. Winnie learns that the music she heard comes from Mae's music box. She also learns the Tucks' secret: the water in the spring is magic and has made them ageless.
Buffy discovers that Dawn was originally energy known as the Key, having to do with opening up a dimensional portal. Glory, a god from a hell dimension, wanted to get back to her world and needed the Key to do it. Because of this, monks changed the energy into someone that Buffy would protect--a little sister.