Yes, but it doesn't work on Roy anymore

Looking down, you find that the ring is still on your finger... And yet, you're forced to mindlessly follow Roy's order to clean his cock. You suck out the last drops of his cum, swallowing it all.

Tired and confused, you lie back down with the young guard, still unsure if the ring has lost its powers. Roy has a satisfied smile on his face, eyes drooping as he pulls you in close.

"Good little slut," he murmurs, squeezing one of your breasts even as he dozes off to sleep.

You try to concentrate your thoughts, urging him to wake up... But nothing happens. You try once more, focusing on the thought of Roy waking up and leaving your chamber. Again, nothing. He continues to snooze, and soon falls into a deep sleep.

This is not good... Only hours ago you found a power beyond your wildest dreams, and it's already gone! You begin to regret wasting such a gift on controlling Roy in the sheets, when you could have used it to achieve so many other things... Important things... And now all the power seems to have left the useless (yet pretty) bit of metal.

Angry both with yourself and your circumstances, you pull off the ring and prepare to throw it across the room. Just then, you have a thought:

Wait... Maybe Roy has become immune to the ring's power? There has to be some explanation for why it stopped working so suddenly... Maybe its energy isn't spent after all?

Your spirits rising just a fraction, you decide to try and control someone else.