How is the relationship between Silas and Aringarosa expanded upon in Chapters 39 through 41, and what might the consequences be?

Silas is remarkably callous and feels no remorse for killing the nun. However, he is worried more about how the deception he is victim to will affect Bishop Aringarosa. He also is confident that the Bishop will be able to protect him from any consequences. This shows that the relationship between Silas and Aringarosa is almost like that of a son and his father. However, implications are also made that Aringarosa may not be as trustworthy as Silas believes, adding more suspense to the plot.