A distilled alcoholic drink typically produced in South Asia and Southeast Asia, made from either the fermented sap of coconut flowers, sugarcane, grain or fruit, depending upon the country of origin.
During this part of the story, the word "unctuous" means "excessively flattering or ingratiating". It is used to describe the way Baby Kochamma decides to view the current situation.
Vellya Paapen drunkenly tells Mammachi what he's found Ammu and Veltuha do. Mammachi then tells Baby Kochamma but instead of getting angry or upset, she is happy. Because she see's this as God's way of punishing Ammu and getting revenge on Velutha at the same time. She flatters herself instead.
A First Information Report (FIR) is a written document prepared by police organizations in Bangladesh, India, and Pakistan when they receive information about the commission of a cognizable offence. It is generally a complaint lodged with the police by the victim of a cognizable offense or by someone on his or her behalf, but anyone can make such a report either orally or in writing to the police.