Why does Nancy from Oliver Twist refuse to leave her present life?

In "Oliver Twist," Nancy refuses to leave her life because she feels a deep sense of loyalty and attachment to Bill Sikes, despite his abusive nature. She believes that she can influence him for the better and is torn between her love for him and her desire to protect Oliver. Additionally, her life as a member of the underworld provides her with a sense of identity and belonging, making it difficult for her to envision a different future. Ultimately, her complex emotions and circumstances keep her tied to her current life.