***NOTE****
****FROM NOW ON, I WILL BE WRITING IN THE SECOND PERSON. I FIND IT EASIER***
As with the other commands, you feel compelled to obey. The base of your dad's cock is pressed against your septum, which is a little uncomfortable. you then see your mom straddle your head, facing your dad. You watch as she positions herself above his penis and then slowly lowers herself down. You can see the lips of her pussy slowly open up as the head of your dad's cock press against them, and then disappears inside her. You hear your mom gasp, and then groan softly as she continues to lower herself toward your face, taking your dad's enormous cock inside her as she does so.
Your dad's cock had looks to be about eleven inches long and about eight inches in diameter, and your mom's pussy is stretched wide around it. A couple of minutes later, your mom has taken pretty much all of your dad's cock inside her, and the outer parts of her pussy were pressing down on your nose and your eyes. You can't believe it, your parents are actually going to have sex, right on top of your face.
Your mom slowly raises herself up until only the tip of your dad's cock is inside her. The shaft of his penis is already covered in a thick, shiny layer of her vagina's lubricating fluids. She then groans loudly as she slides back down, grinding herself into your face as she does so. Your mom spends the next few minutes slowly sliding up and down on your dad's cock. Both of them are breathing heavily, and groaning loudly. You find it all incredibly exciting, and really are loving every second. No porn movie could ever give the view of two people having sex that you've got. Then again, nobody else has a magic stone that they've used to give themselves, or other magic powers. Not that you're aware of anyway.
Your mom starts sliding up and down slightly faster. She does for a few minutes, before suddenly starting to slide up and down your dad's cock with increasing speed and force. Your mom is now apparently riding your dad as fast and hard as she can, causing them both to groan loudly and continually with pleasure. You're in shock at the force with which your mom is slamming her pussy down into your face, and feeling grateful that you're indestructible and unable to feel any pain.
You estimate that your parents spend about an hour fucking on your face. Finally, you feel your dad's testicles tighten in your mouth. At the same time, your mom slams herself down and grinds herself into your face, as they both let out very loud, prolonged groans. One thing you hadn't considered when you made your wish, was the potential mess. Having your mom ride your dads cock with your face directly beneath it, has resulted in your face being completely covered in her juices. Now that they're cumming, your face is getting covered in that too, all seeping out of your mom's pussy.
Eventually, they stop, and you end with the surreal experience of having both parents sitting on your face. You don't mind though. You're perfectly happy being serving your parents as their slave. And you're looking forward to whatever they have planned for you next.