Fuck her as a genie.

"...hmmm..." Felix mused as he looked down at Diana's tail, which undulated slightly. He shifted his grip to hold both of Diana's wrists in one hand, as tenuous of a grip as it was, and proceeded to undo his fly with the hand he had just freed up. Obviously, she still made no move to free herself. "Do you need legs to have your vagina, or can you form a working one in the tail where it would normally be?" he asked her.

"Oh~!" Diana cooed, liking where this was headed. "Oh yes, Master, that's easy!" she told him. "I just need an order from you, or it defeats the purpose of the chastity belt theme!"

He freed his erection, and rubbed it against the mist that made up her tail, marveling at how it felt solid, almost fleshlike. She bit her lip, moaning happily at him touching her with his cock. He took a step sideways, so the tail was between his legs as he adjusted his grip back to using both hands to hold her wrists. "Good to hear. Then form one for me to fuck, if you would," he ordered her.

Immediately, the mist just below where flesh and tail met shifted, and took the shape of a fully functional vulva. It maintained the constant shifting coloration of sapphire and ruby the tail had, but it was unmistakably a pussy that was begging to be used, to be fucked. "Mmm, oh yes, Master..." she cooed, ready for him as she nudged her hips to rub the lips of the formed labia against his shaft. "I'm ready for you. Always."

He nodded, and shifted his hips until he had his manhood lined up with her pussy, and thrust into her slowly. "Oh..." he moaned as he sank into her folds, bit by bit.

She gave a pleasured sigh and gave him a devoted look. "That's it, you're doing great, Master," she coaxed him.

"Mmmnh... I'm not sure how long I'll last..." he admitted, bottoming out. "I... Haven't had much... sex," he paused as he realized something. "Shit, I forgot a condom..."

Diana giggled as her folds milked his cock. "No worries, Master," she assured him. "Genies can't get pregnant or catch STDs without a wish from their Master."

"...oh that's good..." he smiled as he started moving slowly, before pausing again, making her whine in protest. "...okay, pregnancy I get, but what kind of sick fuck would wish for you to catch an STD?"

She pouted, before shrugging. Well, as much as she could without breaking her wrists free of his grip, which she could still do easily, but didn't want to. "Dunno, Master... I just know it's possible, I don't know if any Master has ever done it."

He nodded, and said, "Okay then... Before we continue, I wish to be unable to cum until you you do."

Her eyes widened, before she smiled and snapped her fingers, making him moan as he felt her magic take hold of his cock. He then began to start moving, pumping his hips back and forth, grunting at the sensations. He wasn't a virgin, be had had a couple of girlfriends in the past, though things ended between them, but this? This was so damn good it made his previous experiences seem bland in comparison.

"Mmm... How are you feeling, Master?" Diana asked, her tail wriggling between his legs.

"So good," he groaned out, speeding up his thrusts as he tightened his grip on her wristbands. He leaned in and kissed her, and she moaned as she enthusiastically kissed him right back.

"Mmmph!" she moaned into his lips as she parted hers, using her tongue to lick at his to signal an invitation. He immediately took it, letting his own tongue slide into her mouth where it intermingled with hers. As their tongues entwined, Diana allowed his to dominate hers.

He was soon pounding into her as hard and fast as he could, already on the edge, and stuck there. His cock was throbbing, but unable to ejaculate until the condition of getting Diana off was met.

She meanwhile bucked her "hips" against him, but kept great care not to put enough **** into her motions to knock him back. It would have been a lot harder if she wasn't a Sex Genie, with perfect control over her sexual responses within her Master's orders. After several minutes of this intense rutting, she was finally approaching her peak. "Mmmnh!" she whimpered into his mouth, the only sign she could give that she was close, given that her mouth was occupied in making out with her Master.

Felix grunted, feeling the walls of her pussy spasming around his shaft, and kept up his pace, before she gave a loud, muffled moan, her fists clenching, and her body seizing up as her climax rippled through her body. Her peak triggered his own, and he met her moan with one of his own as his dick erupted into her depths, her pussy clamping down on him, with enough **** to be just shy of being uncomfortable for him.

His member emptied itself into her as he broke the kiss, wheezing, and on the verge of collapse, his knees shaking as his legs felt like jelly. "...wow..." he finally muttered. She giggled in response at him through her own wheezes, giving him doe eyes.

"Indeed, Master..." she purred. "That was definitely what I signed up for..."