SquareSpQ

Hello, I have a summer camp service that, while purchasing, will ask students to enter their email address and their parent's email address on the form; I want both email addresses they enter to receive my custom email confirmation which thanks them for signing up for the summer camp and gives them further instructions. How do I tell which customer email entered is receiving the confirmation email, and how would I make it so multiple emails entered on this form all get sent the same confirmation email externally?