Daisy and Gatsby were in love in 1917. Even though Daisy still loved Gatsby, she married Tom. This revelation shocked Tom, who learned about it when the group, after traveling in two cars met for a discussion. Seeing the interaction between Daisy and Gatsby revealed the secret feelings.
Tom found out about Daisy and Gatsby's relationship when he became suspicious of her feelings for Gatsby and began investigating. Tom confirmed his suspicions when he discovered love letters from Gatsby to Daisy, ultimately leading to a confrontation between them.
It wasn't mentioned in the novel.
The conflict between Gatsby's Daisy and Tom in "The Great Gatsby" is primarily due to their past relationship and Daisy's inability to fully commit to Gatsby. Tom represents the old-money elite that Daisy is accustomed to, while Gatsby represents new wealth and a chance at a new life. Daisy's indecision and fear of social consequences ultimately lead to her choosing Tom over Gatsby.
Tom is surprised and slightly dismissive when Gatsby tells him that Daisy doesn't love him. Tom believes that Daisy truly loves him and is unconvinced by Gatsby's assertions, viewing Gatsby as a threat to his marriage.
Tom's having an affair and Daisy knows it, while Daisy is seeing Gatsby.
In Chapter 6 of "The Great Gatsby," Tom vows to find out more about Jay Gatsby's background and expose him as a fraud to Daisy. He becomes suspicious of Gatsby's wealth and past and aims to protect his marriage to Daisy from any potential threat.
Gatsby wanted Daisy to tell Tom that she never loved him and that she was leaving him for Gatsby. He thought that by having her confess her true feelings, it would solidify their relationship and lead to them being together.
Nick knows Daisy and Tom Buchanan in "The Great Gatsby" because Daisy is Nick's cousin. He meets Tom through Daisy, as Tom is her husband.
The final confrontation between Tom, Daisy, and Gatsby took place in the Plaza Hotel in New York City. Tom revealed Gatsby's criminal activities to Daisy, leading to an argument and Gatsby's realization that Daisy would not leave Tom for him.
Jordan Baker plays the piano when Gatsby, Nick, and Daisy are in Tom and Daisy's house.
Gatsby tells Tom that Daisy never loved him and that she has always loved Gatsby instead. He confronts Tom about his mistreatment of Daisy and insists that Daisy will leave Tom for Gatsby.
In "The Great Gatsby," Daisy never reads the letter from Gatsby. Tom discovers the letter and shows it to Daisy, who decides not to confront Gatsby about it. Daisy chooses to remain with Tom, ultimately betraying Gatsby.
After Gatsby's death, Tom and Daisy leave town to avoid any connections to the tragedy. They continue their privileged lifestyle, seemingly unaffected by the events surrounding Gatsby. Daisy stays married to Tom despite her past with Gatsby, while Tom continues his careless and entitled ways.
It's ironic that Tom is angry at Daisy for loving Gatsby because Tom himself is having an affair.