“...fuck you in the ass.”

Your words seem to have quite an effect on Grace; on hearing them, her eyes widen with—not fear, you can tell that much. She seems almost...excited?

“I shall, of course, do as my Master commands,” she says.

“Oh, I’ll bet you will,” you say, as a grin spreads across your face. “Go grab some lube and get my cock ready.”

Grace nods in acknowledgment and ducks under the ring, re-emerging with a bottle of lube. She squirts a dollop of it into her hand and rubs it onto your shaft, quickly getting you hard with her dexterous rubbing. Once you’re fully at attention and fully lubricated, she drops to her knees and presents her ass to you, using two fingers to rub the last of the lube around her back door.

Once she’s ready, you position your cock just right, grab her firmly by the hips, and thrust deep inside her, shoving the full length of your erection into her waiting hole. She lets out a deeply satisfying noise of pure arousal that’s less of a moan and more of a whimper, and that’s all the encouragement you need to start fucking her ass in earnest.

“Fuck, you’re tight,” you moan as you pound into her again and again, and she is—her asshole clamps around your shaft with each thrust, making sure that you to feel it rubbing against every inch of your lubed-up cock. The sensation pushes your lust to even greater heights, and you speed up your fucking as Grace gasps with pleasure under you.

Hearing the noises she’s making, you give her a smack on one of her smooth, quivering cheeks and say, “Tell me what you want.”

“More,” she says desperately. “Please, Master John. Harder.”

“Well, all right. But only because you begged so nicely.” You intensify your pounding even more, slamming your cock up her ass with incredible ****. It jiggles erotically as you fuck it hard, even in spite of how tightly she’s clenching it. Your balls slap against her pussy with every earth-shaking thrust, splashing drops of cum onto the canvas below from the soaking wetness of her arousal.

It doesn’t take long after that for her to be driven to a climax, and a pretty spectacular one at that. Her moans pitch up for a few seconds, giving you advance notice of what’s about to happen, but you’re still a bit surprised when she throws her head back and screams in pure submissive delight, gushing like a firehose as you continue to take her for everything she’s got.

Your own orgasm takes longer to reach, but it’s every bit as dramatic when it does. Pleasure wracks your body as you pump out what feels like a river of cum into her ass. It’s almost a shame that no one gets to see the load you just blew—but for what you just experienced, it’s more than worth it.