What does Reza's photograph symbolize in the novel, Burnt Sugar?

The old photograph of Reza that Antara retains for many years, symbolizes control. Because Antara's relationship with Reza has been defined by a fear of losing him, she hopes that stealing a photo of his face will allow her to hold onto him forever. By hiding the original photo from her husband and mother, Antara believes she can control the narrative around him, ultimately attempting to conceal the truth of their affair.