Cadence lays a spell on shining that makes his cock shrink and makes her already large futa cock grow. And then fucks a sissy submissive shining in public, he only begs for more, with stomach bulging and cum inflation. Please? ^~^

Shining watched his shrinking cock with a kind of morbid fascination. For an instant, he wondered if he’d been insane to do this. What kind of stallion would give up a fourteen-inch cock? And what kind of stallion would give that size up to his wife?

And then he caught Cadance’s own bobbing stallionhood out of the corner of his eye and instantly knew: He would.

All the same, he couldn’t help but whimper softly as he watched his ten-inch cock shrink down to eight, then six, then four inches. His once-enormous balls, which once held enough seed each to fill a tall glass, now were barely larger than acorns. Meanwhile…

Meanwhile, Cadance’s own cock had swelled beyond all imagination. Her balls were each the size of large grapefruits, audibly sloshing and churning with seed. Her shaft, which had been growing nonstop from its already-impressive size of eleven inches, finally tapered off at a full two feet in length.

He swallowed, and uncertainty flared up inside of him again. That swaying, throbbing member filled the entirety of his vision. He suddenly felt very small. Unwillingly, his hooves moved to cover up his crotch. The second they did, though, he knew he’d made the wrong move. He was small enough now that covering his junk was probably easier than showing it.

“Aw,” Cadance cooed. “Is my little husband feeling embarrassed?”

Shining nodded shyly. He couldn’t keep his eyes off of Cadance, who was currently stroking her enormous, veined shaft with both hooves. He greedily drank up the sight of her vast, flared head; gorged himself on the sight of her massive, swelling balls; filled his lungs with her overpowering scent. Here was the masculinity that he’d lost: Wrapped up and stolen by this lithe, perfect mare.

“Well, don’t worry.” Cadance smiled, not unkindly, and brushed a hoof behind his ear. His whole body shivered at her touch, and he reluctantly allowed her to pull his hooves away from his crotch. “I’ll make sure you feel needed before the night’s done.”

Her eye caught on his tiny little prick and her lips curled up. “Though you can’t do much with that little thing, I’m afraid. At least you’re still good for something else.” She made a rotating motion with her hoof. “Turn around, honey.”

Shining turned around a hundred and eighty degrees on the bed. His ass stuck up high in the air, and he bit down on his lip while his tiny cock throb. This was what he wanted, wasn’t it? To be dominated by his wife, to be shamed by a mare who was more stallion than he? That’d been the plan, at least.

And when he felt Cadance’s massive schlong prodding against his back door, he knew that he was still with the plan, one hundred percent.

She slipped inside of him with but a twitch of her hips, her massive cockhead hesitating only a second before stretching him impossibly, incredibly wide.

“So loose,” Cadance said. She sounded surprised. “Looks like my husband’s been letting the new recruits fill him up again.” She tutted sadly. “Well, you know what the punishment is for infidelity, dear.” Her hooves rubbed soft circles into his back. Shining whimpered softly as Cadance leaned forward, her cock sliding into him up to the medial ring, which bulged even wider than one of his legs.

He whined softly as she nibbled on one of his ears. “You want the rest of this big, fat cock,” she whispered. “Don’t you, sweetie?”

“Please,” he whimpered. “Please, please, please.”

“What’s that? I didn’t hear you.”

His rump twisted, his cheeks tightening around her member. “Fill me up. Fuck me. Make me your mare.”

Cadance lightly stroked along the back of his neck, and he shivered again. “Well, since you asked so nicely…”

Cadance pulled her cock all the way out to the tip and left it there, teasing. Then, with a sharp intake of air being Shining’s only warning, she grasped his ass firmly in hoof and rammed herself inside of him.

Stars exploded in Shining’s vision. “Oh,” he moaned. “Oh, oh, oh.” He felt so stretched, he felt so full; gods they should have tried this ages ago.

Cadance just kept pounding away at relentlessly. Her hips smacked against his again and again, her massive, musky balls slapping against the backs of his thighs as she rutted him senseless. He loved the way she spread him wide, loved the way she filled him like nopony else ever had.

“You like that,” Cadance grunted, “you little filly?”

“Yes, yes!” Shining realized he was shrieking, then realized he didn’t care. Moving a hoof to his stomach, he felt a sizable bulge prodding against his coat in time with Cadance’s thrusts. He groaned in pleasure and in shock. She was actually bulging out his torso with her cock, her incredibly stallionhood struggling to fit all the way inside of him. He was just a cocksleeve to her, waiting and ready to be filled with her cock and seed.

That knowledge set him off. Shining let out a whimpering cry as his stiff little cock throbbed. A few weak spurts of cum that might have been called “ropes” by a kind onlooker fell from his tip, dampening the bed. He closed his eyes to his own pathetic orgasm; the pleasure was so good, even with that small a size. How could it feel so good to feel so small?

“Ooh.” Cadance was grunting harder now, snorting, whinnying, even. “I’m - I’m - ” She didn’t even make it to the last word before she bottomed out inside of him for the last time. Her cock flared impossibly wide, and Shining’s eyes widened as he felt his insides stretching even wider to accommodate her girth.

And then she was cumming, a flood, an ocean of spooge that was going to fill him up and drown him in her essence. He could feel it washing into him like a wave, ropes and ropes of thick, hot cum that filled his stomach, filled his ass, even started to leak back outward from his poor abused asshole.

His belly actually bulged outward even further as she flooded him with load after load of her seed. Shining watched, eyes wide, as his wife bloated him with what must have been a half-dozen gallons of cum. His stomach just kept dropping downward, growing heavier and wider until it must have reached almost all the way down to his knees. Shining panted, his cum-filled belly swaying and smacking against his legs as Cadance’s orgasm finished off.

Eventually, after another fifteen seconds, it finally did. Cadance leaned forward over him and - not accidentally - driving her cock again deep into him, until almost the entirety of her shaft was surrounded by her own seed. Shining turned to face her and kissed her right on the muzzle, long and deep.

“How was that?” Cadance asked. She sounded almost shy.

Shining groaned deeply. “Incredible.”