Recalling in "Educating Nina"

Renzo (Esteban Lamothe) said that it was he who wrote the book of Antonio and decides to confront his brother, saying he feels that he lived what he describes the book. 

Antonio, it defends telling that there are many people who feel identified and feel the history as their own. This explanation confuses Renzo further.

Moreover, Nina (Griselda Siciliani) tells Susy (Jorgelina Aruzzi) that saw the real Mara and then think that surely Renzo will have met Mara and she will be mistreated, why now Renzo puts distance Nina, knowing that they are two different people.