Their whole relationship was based upon money, not true love. Tom came from old money and was extremely wealthy. Daisy married Tom for his money and the lifestyle he was able to provide her with, not because she was truly in love with him. Daisy was an extremely selfish, materialistic and cold hearted person who was consumed by money.
Both Tom and Daisy had an affair with another person outside their marriage in the novel. This showed their lack of true love and respect for each other. They were both aware that their spouse was having an affair, however, they both did not seem to care and came back to each other.
Tom and Daisy both cared greatly about their image and how other people within their society perceived them. Tom and Daisy very much enjoyed having a high social status and being that wealthy couple that other people admired. This was part of the reason they stayed with each other even though they were not happy. It could have hurt their social status and people would have perceived them differently if they divorced. Tom and Daisy were both consumed with their image in society and how others perceived them.
Tom and Daisy's relationship was solely based upon money and social status. Their relationship lacked true love, happiness and respect for one another. Daisy was just an object to Tom and Tom was just a man who could provide Daisy with the lavish and extravagant lifestyle that she was accustomed to.