It's Saturday afternoon, and you have nothing to do. You don't have any work today, the griffon you'd befriended a few days ago is out of town, and you've already run all of your errands for the day. It's unseasonably warm in Canterlot, too; warm rays beating down on the plaza making it hard to find any motivation at all. For all these reasons, you find yourself lazily sitting on the edge of the nearby fountain, just watching ponies go about their daily routines with a sort of bored detachment. Even more so than your humanity, you feel out of place for your current state of repose: Canterlot is most assuredly not a slow-moving city. 

One dark blue unicorn stallion in particular seems almost frantic. His eyes cast about the plaza quickly, darting from pony to pony. You can't hear him, but the movement of his lips makes it pretty clear he's repeating "No... no... no..." to himself with each one he examines. The crowd pays him no mind, but your idle curiosity is piqued. You look directly at him.

Almost at the same time, he looks right back at you. The two of you blink at the sight of each other, but the stallion does not take his eyes off you. He continues to examine you carefully, and you just barely resist the urge to look away or leave - being stared at just feels weird, and as a human you tended to get plenty of that already. Before you come to a decision, however, the unicorn seems to reach one of his own. He sets out towards you at a brisk trot, purpose shining in his large eyes. 

Reaching you, he draws up short. This time, you hear him clearly over the din of the busy public space. "... Exotic, tall, about the right age, not busy, curious nature... perfect. You'll do wonderfully." He eyes you up and down, and you begin to feel a little annoyed. You don't know what the hell he's talking about, but you don't appreciate being addressed like you're not even there. Abruptly, he seems to acknowledge you directly for the first time. Looking up into your face, the unicorn attempts a friendly, dissarming grin. "Hey, human. How'd you like to make a quick hundred bits?"

----------

You must've been more bored than you thought. 

It wasn't that you needed the money all that badly - a hundred bits was definitely nice, but you weren't so poor that you to had to make ends meet in shady, unspecified deals with strangers. Still, you really did not have anything in particular to do today, and the curiosity really was almost overwhelming: What did the pony want you for, and what's more, what kind of shady deals does a pony even make? They practically eat rainbows and shit butterflies, here. Truth be told, you found it refreshing, but the point remained: you'd never seen ponies conduct any kind of under-the-table business, and you found yourself bizarrely fixated on finding out what this was all about. 

The moment you'd accepted, the stallion had given a victorious little buck and led you down a side street without further delay. He'd given you all the money in advance - leaving you once more struck by the honesty of this world - but hadn't said a word about what it was he actually wanted you to do. You kept your peace, content simply to follow him as he led you on a meandering path through old, but well-maintained streets, gradually veering into the residential district. You found yourself drinking in the scenery in appreciation; this was a nicer neighborhood, and it definitely showed. Cobblestone was the order of the day, giving the street that cultured look so characteristic of the capital, while planters full of flowers, ferns, and even fruit hung nearly anywhere there was room. 

Though it was perhaps not a perfect neighborhood. A high-pitched scream of frustration sounds out from the picturesque house directly in front of you. You yelp in surprise, scrambling for cover as a thrown typewriter, propelled along by unicorn telekinesis, hurls itself from a second-story window. The instrument smashes into the ground loudly, somehow seeming miraculously intact. The stallion - whose name you had eventually garnered was Nightlight - simply winces sharply. "Looks like we made it just in time." He loks back over his shoulder at you, a fairly easy motion for a long-necked pony. "Well, here we go." Without a second glance, he opens the front door and heads in. You give the discarded typewriter a wary glance, but follow.

"Honey? I'm home!" Nightlight calls out cautiously as the two of you make your way through the kitchen. Nightlight steps gingerly, as though half-afraid of what he will find, and you find yourself mimicking his pace. The room is empty, but you hear a low, acknowledging growl echo from a closed door at the top of the stairs. Nightlight glances at you, biting his lip before continuing hopefully. "... And I brought.... ah... something to help you relax!" 

The seconds stretch out as the two of you stand stock still, looking at the foreboding landing at the top of the stairs. The low, steady ticking of a grandfather clock seems thunderously loud in the silence.

Slowly, the door swings open.

Nightlight breathes a sigh of relief. When he looks up at you, he seems tired. "Well, that's your cue. Go ahead and get up there. You'll know when the job is done. Good luck."

Wait wait wait - that's it? That's all the explanation you get? What exactly does he want you to do?

The stallion looks away from your searching gaze, seeming uncomfortable with the question. "My wife is... a very, very talented writer. But she doesn't do so well with writer's block. It gets pretty miserable sometimes. When that happens, she needs something, a little... exciting, to get her stimulated again. She's never met a human before. I think you'll do the trick. Like I said, kid... good luck." Nightlight doesn't wait for your response, turning and walking out the side door where the two of you had come in. Thoroughly confused, all you can do is watch him go. Once he finally vanishes from sight, you turn your gaze to the top of the stairs, where the door still hangs ominously open. 

----------

The mare sitting at the small writing desk beside the window sure looks harmless enough. She's older, to be sure, but one look is all you need to know that the unicorn has taken good care of herself. Her mane is still sharply cut, retaining the sheen and bounce of a twenty-something. Her muscles are still firm and compact, and when she smiles warmly at the sight of you, there's no hint of sag or wrinkles in her facial features. Only a slightly deeper voice and mildly faded coat betray her true age, and the sight of a small family picture on the desk beside her shocks you - no way this pony has two adult children!

Following your gaze, she giggles lightly. "I'll take that as a compliment, thank you! My name is Twilight Velvet. And you are?"

Automatically, you introduce yourself, sitting down in the chair across the desk from the mare as you do so. Velvet smiles again, seeming completely at ease. Is this really the same mare you heard before?

"What a nice name. Human, is it? I've heard of your kind before, but never met one. My, how exciting!" She leans back in her chair before continuing, and you feel strangely as though you're being interviewed. "I always love meeting new people. I'm a writer, you see, and I find it very helpful to draw from life experiences. The more I know, the better I can write it."

She frowns, now, leaning forward in her chair and seeming to stare off into nothingness. "But sometimes, I run up against a wall. Try as I might, I just can't get inspired. I know what has to happen in the story, but I can't think of how to make it happen. I get more and more frustrated, and eventually I don't want to write at all. It drives me absolutely crazy. I just need a little something, you know? Something to help me... " Once more, she looks directly at you, and smiles. The warmth from before is gone, however, and something else has taken its place. Something predatory. "... unwind." Velvet licks her lips. 

"And here you are. My husband, bless his heart! He always brings me the sweetest gifts to help get me inspired again. Like I said, I've never met a human before." Her horn lights up, and you feel a tinging envelope your groin. Looking down, the hem of your pants is engulfed in a shimmering magical field, the zipper descending of its own accord as the button smoothly releases. "Sooooo, what do you say we get to know each other better?" 

Reflexively, you turn and look at the door - this is getting a little weird, even for you. But Velvet is having none of it - no sooner do you begin to shift in your seat than the entrance to the room is seized in a similar field and swings shut. "Ah, ah, ah." She chides gently. "Come on, now." No sooner than the door shuts and the magical aura around it dies, than another one engulfs the feet of your chair. You find yourself sliding across the short distance separating the two of you until you are almost face to face. Velvet leans forward across the desk, her lips meeting yours in a soft, wet kiss. The older mare pulls back, smiling mischievously. Your lips tingle softly where hers had met them. "Where's your sense of adventure?"

... Fuck it. You're in.

"Attaboy!" Twilight Velvet cheers, and you hear a bizarre -thump- as something presses into the underside of her desk. Before you can question it, you find her magic once more pulling at you, rapidly removing the rest of your clothes and shoving the chair away into a convenient corner as you stand. Your manhood twitches, rapidly rising to the occasion as Velvet eyes you appreciatively. Her gaze falls on your penis, and her eyes light up in glee. "Huh... I wonder if..." 

Cutting herself off, the white-and-purple maned mare shakes her head harshly. "No no no, I'm not being fair, am I? Well, you showed me yours, after all. So I guess it's only fair if I show you mine." Her grin widening fit to split her face, Twilight Velvet stands and steps out from behind her writing desk, and you get a good look at her for the first time. 

Marecock. 

So. Much. Marecock. 

Your eyes bulge, your jaw dropping at the sheer size and strength of the enormous rod before you. You've heard of futanari before, but Jesus Christ! Twilight Velvet's purple shaft is easily two or three times the thickness of your arm and almost as long, jutting out obscenely from the innocent, cute-looking older unicorn's crotch like a cannon ready to fire. Angry veins throb here and there along its surface, adding to the impression of sheer power the cock conveys. Her flared tip already dribbles copious amounts of precum, enough to constitute a full orgasm for you. You would think it impossible at first glance, but the equally huge and heavy furry ball sack beneath her makes clear where all that sticky, heady-smelling excitement is coming from. They hang freely beneath her, testament to the unicorn's incredible virility, and you can't help but feel awed. That is something else. 

Watching your expression, Velvet rocks her hips back and forth, her cock swaying obscenely along with her movements, letting you get a good, long look. "Aww, do you like it?" Her horn wraps its grip around the titanic mass of flesh, and it jerks in her grasp. "I think it likes you too~"

Mesmerized, you watch the unicorn slowly jack herself off, her flare pointed directly at your face, the bulbous flesh giving off a powerfully musky smell of sex. Her cockslit occasionally oozes forth another heavy dollop of precum, covering the surface of Velvet's horsedick in a sticky sheen that squishes lewdly in her magical grasp. Your cock has long since risen to full attention, and you watch every movement with rapt attention. 

"Mmm, you like watching this?"

Not trusting yourself to speak, you nod.

"You want to fuck?"

... There's no way you can take that. No way. It's just way, way, way too big. You don't even want to try.

Twilight Velvet chuckles to herself. It's a humorless sound. "Silly boy. Who said anything about me fucking you?" Using her magic, she pulls you forward slightly, bringing you level with where she sits in her chair. You find your much smaller cockhead pressed directly against her massive flare. With a sick thrill, you realize exactly what she meant.

"You like my cock so much, get in there."

Complete and total uncertainty seizes you. You've... never done anything even remotely like this. Ever. 

Her eyes sparkle. "Neither have I." Once more gripping your back, she pulls you forward, and your cock sinks into the massive, hot, tight grip of her own. 

You gasp in unison, completely overwhelmed by mutual sensation. Velvet's penis is massive, with a cock slit to match, and her ample precum has done much to lubricate her passage. Even so, it's unbelievably tight, and her inner passage clamps down tightly on you as you enter. Your body moving on sheer instinctive breeding urges, you lean forward, widening your stance and steadying your hands on the unicorn's massive shaft in order to give yourself a better angle for penetration. Your hips press forward slowly but firmly, the rest of your shaft slowly disappearing into Twilight Velvet's massive glans. Her flesh bulges slightly as you insistently push your way inside, and she screams out in frenzied bliss. "Ohh, f, f-uuuuuuuuuuuck!" Her cock twitches again, powerfully, rippling around your own, and you groan at the intoxicating stimulation. 

The entire world washes away in Twilight Velvet's grip, and you realize that nothing else in the world really matters. Pressing more insistently, you are rewarded with another pleasured scream as your shaft sinks deeper into the hot, sticky embrace of marecock. Looking down at where your two bodies are joined, you are stunned to see you are now balls-deep inside the unicorn's cock. It bulges obscenely with your presence. The thought of pulling out is abhorrent to you; nothing that feels this good can possibly be wrong.

The heavy groan of the unicorn, however, combined with the rapid rising and falling of her chest, is still enough to cut through the haze of your lust. Concerned, you ask gently if she's alright. 

Velvet's eyes snap onto your own in a fierce glare, despite her continued panting. "Who... told you... to stop!?"

Grinning, you pull out of her embrace halfway before pushing in once more. The unicorn's heavy precum pools around your length, easing your passage and coating your entire prick in her sticky pre. It feels wonderful, and you begin to thrust a little more urgently as the fleshy tube gradually becomes more and more accepting of your passage. Twilight moans, instinctively grabbing at the bottom of her shaft, and an idea strikes you. You begin smoothly jerking her off, rubbing up and down along the end of her prick as her own hooves work frantically at the base in mutual masturbation. You cry out at another particularly hard twitch of her massive cock, just barely managing to resist cumming, and redouble your eager fucking of the unicorn's penis. Pulling almost all the way out, you see that your penis is completely covered in her potent white seed. Burying yourself inside her once more, you begin to hump Velvet's flare as fast as you can, suddenly desperate to fill her with your appreciation.

Velvet gives a series of short, adorable yelps each time you hilt yourself inside her cock, but the dazed grin on her face makes her feelings on the matter clear. The look of pleasure etched across her face is enough to drive you over the edge, and you thrust once, twice, three more times before burying yourself as deeply as you can with a shout. Your balls tighten, and you cum hot, heavy, and hard, straight into Twilight Velvet's grasping penis. 

Once again, the older mare screams in forced pleasure as your seed washes into her. Left with nowhere else to go, your semen shoots down the unicorn's cock in forceful spurts, the sensation electrifying the mare's entire body. She spasms, her entire world going white as your cum finds its way into her heavy balls. 

It's far more than she can take. Twilight Velvet orgasms as hard as she ever has in her life, her own furry sack tightening on her large nuts and driving shot after shot of marecum surging up through her shaft. You pull out just in time, but Velvet manages to return the favor anyway. As you pull free, falling to your back with an -oof-, the mare's enormous rod spurts directly into your chest. The sheer might of Velvet's cock is enough to liberally coat you in her thick seed, and she is far from done. Velvet trembles as her cock throbs again and again, jerking as it covers your face, chest, and stomach in the proof of her virility. When she finally finishes nearly half a minute later, stumbling away in a semi-conscious delirium,  you can scarcely breathe through the thick musk burying you. Tentatively, you open your mouth and take a little lick. Then, blinking, you take a bigger one.

"Hey." 

Looking up, you see Twilight Velvet lying on the floor across from you, satisfied exhaustion writ clear across her features. Her cock receding back into its sheath, she is once more the very image of an adorable pony. She giggles at the sight of your jizz-encrusted face. "Hey, you look good like that!" Smiling, she holds her fore hooves open for a hug. Sliding across the floor, you embrace her with a sigh. Gently, she strokes the back of your head as the two of you recover from your mutual ordeal.

"Ever thought about being a muse?"