Why does he say so, and how does that statement relate to the different authorial voices found in the book

We have read the Prologue of the book, where Cervantes states that he is the STEPFATHER of Don Quixote. Why does he say so, and how does that statement relate to the different authorial voices found in the book ? Please list these different voices. Select and instance where Cervantes talks about the Arab historian Cid Hamete Benegeli and post what he says about him.