Once on board, go to the Pursers Desk (Information desk) and ask for
another S & S card to your son's room for your use. Each S & S card
is only for a specific room. This way you will have 2 S & S cards
(room keys) for your room and a total of 3 for your son's room. You
can have as many names authorized to make purchases on your S & S
account as you want. If you want, your son's and friend's cards, will only
be ID and room key, no purchases. Just make sure that extra card is not
used to get off the ship with. It will not work. Just visit the Pursers Desk
and explain your situation, I'm sure they will be happy to assist you.
Have a great cruise and hats off to you for being a responsible parent!!