Tanvo paced from one end of the small bedroom to the other, a confusing mix of anxiety and arousal twisting his infinitely empty guts. As a hellmouth imp, he was used to having all manner of entities, objects, and energies crawling around his insides waiting to escape. His belly could become a portal to realms beyond imagining. But the stuff twisting his tummy had no precedent.
On the one hand, his current arrangement was humiliating! He was a low-ranked demon in the infernal hierarchy, sure, but being used as a sex toy was not a very rewarding or dignified life! Iris, his Mistress, had him wrapped around her comparatively large little finger. She towered over his mere three feet height and could do anything she wanted to him...and she often did. He'd been used in so many ways since he'd stumbled into her oasis tavern, and frankly, he had had enough!
But on the other hand...He blushed, remembering every encounter with Iris that had made him delirious with pleasure. Being a succubus herself, she could bend his little body to her every whim and make him enjoy being used. One moment he'd be balls deep inside her, the next he'd have his ass raised and be begging for her to grow out her dick again and impale him like some kind of horny animal. He'd recover, totally spent and soaked in cum, and wonder if next time he would have the strength to finally take a stand.
It was approaching closing time. Around when Iris would come up to her room, body aching with need from hours spent around attractive patrons who she couldn't very well bend over and knock up for fear of losing business, or worse, being seen as an inhospitable host! And when she arrived, she'd be looking for a particular imp to use as a stress relief tool. But he swore to himself that he would keep his wits about him. He wouldn't be lured into her sinister grasp!
"Tanvo honey," her deceptively demure voice purred from behind the closed door, "Are you ready for some fun?~"
Her words wormed their way into his brain. His knees wobbled and he fought to keep the memories of staring up at his Mistress from rising unbidden to his mind's eye. Even when she stepped into her room and he caught hint of her seducing aroma, he kept his composure. The lump in his trousers twitched, however, giving away to a careful observer how much his desire was chewing him up inside.
"N-not tonight, Mistress," he said, fists clenched and eyes narrowed. His impression of defiance was decent, considering he still wore the absurd harem outfit. It was difficult to be taken seriously in poofy pink pants and sleeves.
Iris was taken aback for a moment. Then, the curve of a devilish smile creased her lips. "You're trying to resist me, aren't you?"
He pouted, his point ears folding back like raptor wings. "I'm not trying. I'm telling you the facts. I need...your respect."
Her laughter, though musical, cut right through his haphazard wall of defiance. "I didn't think I'd see the day. The little Imp has grown a pair! I was beginning to think you would have just laid there and taken it forever...so to speak." She closed the door and shucked off her clothes. It was hard for Tanvo not to notice the sweat clinging to her red skin, not the motion of her tail as it switched back and forth before wrapping lazily around one ankle. Below the tail, her perfectly curved ass made that twitch in his pants hard to ignore. Her perfect pale white hair mirrored by the bushy copse covering her pussy. Her glorious purple horns that exuded all the power of a proper succubus. It was enough to get his heart pounding all over again.
"I mean it Iris," he insisted, fooling neither of them. She tilted her head as if examining the little demon, then gave a theatrical shrug of her shoulders. The gesture made her naked breasts jiggle, exacerbating his problem.
"I suppose you do. Very well. Why don't you take a seat and tell me about your problems? I'll make us some tea."
He was halfway through another rebuke when the meaning of her words got through to him. "Wait, you will?"
"Of course. I listen to all my toys. How can I know how to play with them properly if I didn't?" she asked. She dipped into a chest to pull out some vials, two cups, and a kettle. With a whispered demonic incantation, the runes on the kettle began to glow. With another minor ritual, several glasses worth of unholy water slid from her extended fingers and into the pressure vessel, where she waited for it to brew.
Tanvo hadn't thought he'd get this far. He stumbled forward, trying to straighten out the tangle of feelings in his heart. "I like you, first off. I really do! But I'm feeling like I'm not an active participant, y'know? You call me a toy and sometimes I feel like being one, but I kinda wanna be in the driving seat of the carriage for once."
She nodded along while he spoke, pouring some of the contents of several vials into one cup, before pouring another mixture in the second one altogether. She placed two tiny spoons in both. The water inside soon reached a boiling point, with the kettle emitting a basilisk-like hiss from its steaming spout.
"I think I understand," she began, pouring equal amounts of water into each cup, "You're not feeling totally fulfilled by our relationship. Hmm...perhaps I have been taking you for granted. Badness, it's been so long since I've had a partner who has been able to take the entirety of my maidenhood. You're quite the cocktaker, I do declare."
"Thanks?" he asked, accepting a cup from her. He reached for the one on in her right, but was handed the one in her left. She took hers and sat down next to him. "What's in this?"
"Oh, a little of this. A little of that."
Suspicious of her intentions but ultimately trusting the demoness, he took a deep sip from the cup. He revelled in the warmth flowing down into his bottomless guts. But instead of disappearing into a portal, it kept flowing down. It only stopped until it hovered around his nethers.
"What the-?" He pulled out the loose waistband of his trousers. His prodigiously large cock looked normal, but his apple-sized testicles were growing. Not only that, but it felt to him that they were becoming more tense. Like his biology was miniaturising down the process to vastly expand production.
Iris peeked too, making him close his pants in a misplaced feeling of embarrassment. "Wow! It's really taking a hold of you. I knew it'd had a profound effect on already corrupted bodies. Better drink mine, shouldn't I?" She made quick work of her own cup.
"But what's happening? Why do my balls feel so...full?" he asked. The edges of his swelling orbs were pressing out the soft fabric of his pants. He had to pull them down to give them room to breath, and the sheer state of his predicament was made obvious. Tanvo's nuts had blossomed to twice their usual size while becoming more and more dense.
She brushed his balls gently, making him wriggle away. "It's a special formula I usually give to breeders. With you, however, I just want you to be able to show your appreciation a little more vociferously than before. And what better idea than to increase your capacity to orgasm?" After finishing her drink, she helped him finish the rest of his. After he'd taken every last drop of his 'medicine', she continued. "I bet you're wondering what mine does, aren't ya~ Well, that's a special secret for you to find out. Until then, climb up on the bed, would you kindly?"
He struggled to oblige. His heavy nuts made maneuvering difficult, and even crawling on all fours to the centre of her comfy bed made him thoroughly aware of the sack between his plump thighs.
The moment he flopped onto his back, something latched onto his wrists and ankles. He squeaked in confusion, only to see that his limbs were being bound up by the bedsheets themselves! Iris was whispering one of her infernal incantations again, causing the bedding to become his prison. The final indignity comes when the sheet covers his eyes and stuffs itself into his mouth, forming a crude gag.
