Complex sentence: Inside the house, Katherine is overjoyed by a vision that Caleb has returned with Samuel and the silver cup; she begins breast-feeding the infant, in reality exposing her breast to a raven, which pecks away at her body, leaving her clothes bloodstained.
Split into simpler sentences: Inside the house, Katherine has a vision that Caleb, Samuel, and her silver cup have returned to her, and, in her joy, begins breast-feeding the infant. In reality, Katherine exposes her breast to a raven, which pecks away at her body, leaving her clothes bloodstained.