the "fifth guest" is Tom's mistress who arrives unexpectedly. The "fifth guest" is the butler who takes a seat at the table. What did Jordan Baker tell Nick Carraway about Tom Buchanan? She told him that Tom is terminally ill.
I would think it would be true, as god doesn't approve of a lot of stuff.
Answer:
Q1: Mrs. Dutta felt emotional pain whenever she punished her son.