DOMME:
If there are any remaining orgasms (if you rolled a 5 or a 6) you have free reign.
Keep him tied up and ride him for as long as you like, with rest periods of continual agonising cock stimulation if you so wish.
Have him cum in any way you wish, and do whatever you want with said cum. The more degrading and humiliating the better.
When you're finally done, you can ungag him and make him thank-you for everything you've done for him today before untying!