Are you unfair to your classmates if you help just one friend in an examination?

Your friend is a bright student who hasn’t been able to study for the exams because he/she had been looking after her ailing aunt during study leave.

Your friend is a bright student who hasn’t been able to study for the exams because he/she had been looking after her ailing aunt during study leave. You help him/her in the examination hall. But is this fair to your other classmates?