Her senses reeled as your words washed over her, the primal urge to fulfill her end of the bargain overriding all else. With a low growl, she picked up the pace even more, fucking you harder and faster than ever before. Her breath came in ragged gasps as she neared her own release, her cock twitching violently inside you with each thrust.

Finally, with a hoarse cry of pleasure, Norika felt herself begin to cum.

Wave after wave of hot semen shot deep into your womb, filling every corner of your fertile ground. The sheer force of her orgasm caused her entire body to tense up, muscles spasming uncontrollably as she poured everything she had into you. When the last drop had been milked from her spent shaft, Norika collapsed onto you, panting heavily, sweat dripping from her brow.

She remained still for several minutes, trying to catch her breath while keeping herself buried within you. Eventually, she lifted her head slightly and met your gaze.

The incestuous nature of Norika's sperm is driven by an unyielding desire to perpetuate their genetic lineage, even if it means crossing boundaries that society deems taboo. This primal urge is hardwired into each and every sperm cell; their very existence dependent upon finding a receptive egg with which they can merge and create new life.

As Norika continues to thrust violently inside you, her sperm swim tirelessly through your insides;

their relentless search guided by an instinctual knowledge of what is necessary for survival. They move faster and harder with each passing moment, their desperation growing as the odds of success dwindle. But still they press on, refusing to give up until either they find an egg or exhaust their last reserves of energy in the futile pursuit of immortality.

Her sperm are larger and faster than most, allowing them to penetrate deeper and deposit their cargo more efficiently. In the end, it is one of Norika's lucky swimmers that manages to break through the final barrier and reach your egg's nucleus first. Its payload - a perfectly formed set of futa genes - is injected directly into the heart of your potential offspring.

The remaining sperm are left to fight over the scraps, but it is too late;

Norika's seed has already done its work. The genetic material from her ovum begins to replicate and reprogram yours, slowly transforming your embryo into a perfect blend of both futa and Norika. Over the course of the next few days, this delicate process will continue unabated as Norika's sperm incestuously abuse your egg, ensuring that you carry her precious gift to term.

Her eyes widen in surprise as she realizes what you're implying. "Oh... um..." She looks down at her now softening cock, then back up to meet your gaze again. "Well... if that's what you want..." she says hesitantly.

The look on your face is enough encouragement for Norika. She starts stroking herself again, already growing hard under her touch.

"Ohhh... yeah..." Norika moans as you take control, pounding into her with abandon. Her hips meet your thrusts eagerly, grinding against you as she comes closer and closer to the edge again. "Fuck yes!" She cries out, arching her back off the bed as another powerful orgasm washes over her.

Her body tenses up as she comes, squeezing your cock hard inside her ass while waves of pleasure rock through her.

Norika thinks for a moment, considering the offer. "Alright," she says finally. "If I win this bet and get to lose my virginity, then I want to be in charge during sex. I want you to do everything I say." She swallows hard, her cock twitching beneath her sweatpants. "And if we find someone else... maybe we could all have some fun together?"

"My cock is..." Norika hesitates, then takes a deep breath. "It's about eight inches long when I'm hard." She looks down at her lap again, feeling self-conscious. "And pretty thick too... Do you think that's too big for you?" Her voice wavers slightly on the last word.

I gasp for air as the pleasure finally begins to ebb away, leaving me aching and needy in its wake. I watch, stunned, as you get up and leave me lying here, my cum-covered hand falling uselessly to the bed beside me. "Unga..." I whisper, tears welling up in my eyes. "I'm sorry... I just wanted... I didn't mean..."

But he's already gone, leaving me alone with my thoughts and my aching body.

Oh no! He left? Without fucking me?