"I became at once the most important person in her life - you understand?"
Gerald’s recounting of his affair with Eva/Daisy reveals his self-importance and the power dynamics in their relationship. It shows his influence over her life and the dependence he created.
"Everything's all right now, Sheila. What about this ring?"
Gerald’s attempt to revert to the status quo after the Inspector’s departure highlights his denial and unwillingness to change. It shows his superficial understanding of the events and their significance.
"She was young and pretty and warm-hearted - and intensely grateful."
Gerald’s description of Eva/Daisy emphasises his romanticised view of the relationship. It reveals his attempt to justify his actions and his failure to grasp the full consequences of his behaviour.