How did Hemadpant's brother react when he learned that Sai Baba was going to write the book through him?

The source material from Chapter 2 does not contain any information about Hemadpant's brother or any other family member's reaction to the creation of the book. The narrative focuses solely on the interaction between the author and Sai Baba. Baba's profound statement, "He is merely a pretext; I myself shall write my own story!" is presented as a personal assurance and divine commission to the author. The text emphasizes the author's need to dissolve his ego, but it does not delve into his family life or their opinions on this spiritual undertaking. The focus remains on the author's internal state and Baba's promise.