… weekend nanite shenanigans

It's the weekend. Time for some DNA altering sexual shenanigans. You and your girlfriend Stacy alternate between choosing the sexual fantasy for the weekend. You've had all manner of dominant male roles, whilst she has tended towards submissive female roles.

It’s Stacy’s choice this time and she’s been tight lipped about the nanites programming. That makes it all the more interesting. You inject the DNA altering nanites and settle back into your bed, naked with Stacy. Then things start to get interesting.

Stacy's body begins to change. Her skin becomes coarse and hard, muscles ripple underneath as they grow. Her chest flattens and her waist narrows, her hips widen and her ass tightens. Her voice deepens as her features sharpen, becoming more masculine.

Meanwhile, you begin to feel a different sort of transformation taking hold. Your body starts to shrink, becoming smaller and more compact. Your breasts enlarge and your hips widen, making your ass round and perky. Your cock shrinks, becoming a small, sensitive slit.

As the changes finish, Stacy is a strong, muscular man, and you are a petite, sexy girl. Stacy looks down at you with lust in his eyes and grins. "Well, well. Look who's the little slut now."

"Wait!? What have you done?" You ask, your voice high and decidedly sexy. You reach for your breasts. They're large and overly sensitive. Your nipples grow erect and fat and a jolt of pleasure echoes between your thighs. You are tiny!

Stacy laughs. "Oh, you'll find out soon enough." He picks you up, lifting you effortlessly. "Let's get you all nice and wet for your first time as my little slut." He turns you about and you stare at his large cock as he positions you on your hands and knees. Your breasts hang from your chest, swaying slowly as you realise he is going to fuck you doggy style. Your pussy quivers pleasantly at the thought. "Are you ready for your first cock, little slut?" Stacy growls in your ear. "Say yes!"

You gasp as the head of his cock presses against your entrance. "Yes!" you moan, feeling his size stretch you as he begins to thrust. "Oh god!"

He laughs, his deep voice vibrating against your back. "That's it, my little slut. Take it all." His thrusts become harder and faster, filling you up as your mind is flooded with the feeling of being used and owned. You moan and whimper, arching your back to take him deeper. The pain mixes with pleasure, creating a cocktail of sensations that you never knew could exist. You feel his hands tighten on your hips, his grip like iron as he drives into you.

Your eyes water and your voice cracks as he stretches you open. "You're so fucking tight," he groans, his breath hot on your neck. "But you're going to learn to take it all." You whine, your body trying to adjust to the sudden size difference, but he shows no mercy. He's relentless, pounding into you with a rhythm that makes the bed shake.

The room is filled with the sounds of skin slapping against skin and the wet sounds of your pussy taking his cock. You feel so small and helpless beneath him, and it's oddly thrilling. You've never felt so... owned. So completely used. You realize with a mix of horror and excitement that you're enjoying it. Your body is responding, your pussy getting wetter, your clit swelling with each hard thrust.

Stacy notices your reactions and smirks. "That's right, slut. You're loving it." He reaches around and starts to rub your clit in tight, fast circles, making your eyes roll back in your head. "You're going to cum for me, aren't you?" His voice is a command, not a question. And your body responds, your orgasm building rapidly. "Cum for me, slut. Show me how much you like being fucked by your man."

You try to resist, to hold back, but it's too much. The sensations are overwhelming. You start to buck and moan, your voice pitched higher than you ever thought possible. "Oh god, yes! Yes, I'm cumming!" The orgasm hits you like a freight train, making your body convulse and your pussy clench around Stacy's cock. He grunts in pleasure, his grip on your hips tightening even more.

"That's it," he purrs, his voice low and dark. "Cum for me, baby. Cum all over my cock." He continues to fuck you through your orgasm, his strokes never faltering. You're lost in a haze of pleasure.

“God, I love being dominant like this for a change… we should do this more often… it’s like a whole new level of intimacy,” Stacy murmured, still stroking your new clit with his thumb. You could feel his cock swelling inside you, eager to reach his own climax.

You nodded your head vigorously, still trying to process the intensity of your first orgasm as a girl. “Yes, please, Stacy. I love it too. Don’t stop, I want more!”

Stacy chuckled, his strokes slowing down a bit. He reached around and slapped your ass hard, leaving a red handprint on your new, soft skin. “You’re going to get more, alright.” He continued to thrust, edging towards his own orgasm.

Your body felt like it was on fire. The pain from the slap only added to the intense pleasure coursing through you. You looked back at him, your eyes glazed over with lust. “Fuck me harder, Stacy. Make me scream!”

With a feral growl, he obliged, his hips slamming into yours with renewed vigor. The headboard of the bed banged against the wall in time with his relentless thrusts. You could feel the pressure building inside you, a second orgasm threatening to break through.

Stacy’s grip on your hips grew bruising, his breathing ragged in your ear. "You're going to take every inch of me, slut. You're going to milk me dry." His voice was a mix of excitement and dominance that sent shivers down your spine.

You nodded, your mind a whirlwind of pleasure and submission. "Yes, Stacy! Yes, I will!" Your words were barely coherent as your second orgasm began to build, the sensations from your first still lingering.

Stacy's strokes grew more powerful, and you could feel his cock thickening even more inside you. You pushed back against him, eager to meet his every thrust.

"You're such a good little slut," he grunted, his voice strained with pleasure. "So eager to take it all." He reached down and squeezed your breasts, the sensation shooting straight to your clit and making you gasp.

The pressure inside you grew to an unbearable point, and you felt yourself tightening around him. "I'm gonna cum again!" you screamed, your voice high and ****.

"That's it, slut," Stacy grunted, his rhythm becoming erratic as he approached his own climax. "Take it, take it all!"

You felt yourself on the brink of another earth-shattering orgasm. Your entire body tensed up, and then released as Stacy's cock erupted inside you, filling you with hot, thick cum. The sensation was unlike anything you'd ever felt before, and you collapsed onto the bed, panting and trembling.

Stacy pulls out of you and letting you collapse onto the bed, your legs shaking and your body trembling from the intense orgasm. You looked up at him, your eyes glazed over with lust and a hint of apprehension.

You nodded, still trying to catch your breath. “Yeah, it’s definitely... intense. But what about the weekend? What do we do now?” You managed to ask, your voice still squeaky and high pitched.

Stacy’s grin grew wider. “Oh, I’ve got plans for you, my little slut. We’re going to spend the weekend as boyfriend and girlfriend. Pick something out of my wardrobe… after you shower.”

You stumbled into the bathroom, feeling overwhelmed but oddly excited. Your new body was so sensitive and receptive to touch. The hot water cascaded over your skin, sending waves of pleasure through your new curves. As you washed, you felt your thoughts drift to the day ahead. What kind of adventures would you have as a girl?