What is Tim motive or reason for betraying bess?

Tim betrays Bess primarily due to his desire for self-preservation and the influence of external pressures. Caught in a challenging situation, he succumbs to the demands of authority figures, prioritizing his own safety over loyalty to Bess. This betrayal reflects a complex interplay of fear, vulnerability, and the moral dilemmas faced in dire circumstances. Ultimately, Tim's actions highlight the struggle between personal loyalty and the instinct for survival.