What happens when grete gives violin recital for three lodgers?

In Franz Kafka's "The Metamorphosis," Grete's violin recital for the three lodgers becomes a pivotal moment in the story. During the recital, the lodgers are initially impressed, but the atmosphere shifts when they notice Gregor, the transformed protagonist, who is hiding in the room. The lodgers react with Horror, ultimately deciding to leave the apartment, which signifies a turning point in their relationship with the Samsa family and highlights the family's increasing isolation and desperation. This incident underscores the themes of alienation and the fragility of human connections in the narrative.