How does the change in the singing prole woman’s situation foreshadow what happens to Winston and Julia in 1984?

In Chapter 4 of Book 2, the singing prole woman beneath the window of the upper room at Mr. Charrington’s symbolizes simpler times when people sang just for the enjoyment of it. In Chapter 10 of Book 2, Winston decides that she is a “solid unconquerable figure” representative of working-class people all over the world, “toiling from birth to death and still singing,” and she symbolizes to him simple unconquerable humanity, freedom, and beauty. But, when Winston suddenly hears her stop singing and let out a cry of pain, and then he hears a tub being thrown and crashing, his and Julia’s fate is foreshadowed. Something human and beautiful, their pleasure in each other, will be abruptly terminated and replaced by violence.