As an HR expert, you did the right thing by not giving preferential treatment to your relative's son. It is important to maintain impartiality in the hiring process and select candidates based on their qualifications and experience. Your family members may not understand the limitations of your job role and responsibilities. It is important to communicate this clearly to them to avoid misunderstandings. In the end, the decision to hire someone should be based on merit and fit for the job, not on familial relationships. Keep up the good work in maintaining professionalism in your job.