You can find a custom link to make a payment by clicking on the "Make a Payment" button and copying the link from the address bar. Send the link to who you'd like to make the payment. The link will take them directly to this same portal to make the payment, no login necessary.
You can also add your parent as a Bill Payer in your Settings. A Bill Payer will be notified via email each time a charge is added to your account. To add a Bill Payer you can go to dues, bill payer contact or settings, profile. Once you update your Bill Payer information, every time a charge is added to your account or an invoice is sent, not only will the email you have on file receive a copy, your bill payer's will also.