Fines are criminal liabilities, not civil liabilities. It does not affect the reduction of sentence.
Moreover, if the offender is an adult, his or her family members are not liable for the fine. The court cannot impose an order unless a family member or friend voluntarily pays the fee.
If this part of the fine is in arrears, the offender must first pay the fine as long as he has personal property.
To be clear, fines are criminal penalties, not court costs. No court fees are required for the trial of a criminal case.
Hope this has been explained clearly.