Why does curelys wife get angry when Lennie tells her that george said he shount tale to her?

Curley's wife gets angry because she feels isolated and lonely on the ranch, and when Lennie tells her that George instructed him not to speak with her, she interprets it as a confirmation of her loneliness and dissatisfaction with her life. This rejection fuels her resentment towards the other men on the ranch and drives her to seek attention elsewhere.