The moment that reveals the truth about Mr. Raymond occurs during the children visit to his house. Jem, Scout and Dill witness Mr. Raymond drinking Coca - Cola instead of alcohol, and they notice that his children are not mixed race as the town believes but are actually white. Mr. Raymond explains to Jem that he chose to live a life of pretense to protect his children from facing prejudice and discrimination in the segregated South. His supposed drunkenness and immoral behaviour are facades to deflect attention away from his children true heritage.
By revealing this secret, Mr. Raymond imparts a profound lesson to the children about the complexity of people's lives and the dangers of making judgemnts based solely on appearance or rumour. They come to understand that individuals may not always be who they seem, and it's important to look beyond superficial charade to comprehend the truth