He goes balls deep

He’s already teetering on the edge, cock buried to the hilt inside your prone, sleeping body, every shallow rock of his hips dragging him closer to the point of no return. The last fragile thread of restraint snaps with a silent, savage fuck it. All thoughts of pulling out, of doing the right thing, of sparing you the permanent change, evaporate in a rush of pure, primal need. The only thing left is the overwhelming urge to claim you completely—to flood your womb, breed you, make sure you stay this way forever with his child growing inside you.

“Yes… gonna do it,” he breathes against your neck, voice hoarse and trembling with dark certainty. “Gonna knock you up… make you mine for good.”

With a low, animal groan he draws back one final time, almost all the way out, your slick walls clinging desperately to his retreating length, until only the swollen head remains nestled between your puffy folds. Then he slams forward—hard, deliberate, merciless—driving every thick inch balls deep in a single, possessive thrust. His hips crash flush against your ass, the wet smack echoing sharply in the quiet room as his heavy balls press tight against your clit. The **** rocks your sleeping body forward into the pillow, a muffled whimper escaping your lips, but you don’t wake. Your pussy spasms around him in response, fluttering wildly as if your **** body already knows what’s coming and welcomes it.

He grinds deep, circling his hips to stir himself inside you, the flared tip nudging insistently against your cervix, demanding entry to the fertile depth beyond. “Right there… right into your womb,” he whispers feverishly, sweat dripping from his brow onto your back. “Gonna fill it up… pump you full of my cum… get my own sibling pregnant.”

The pressure that’s been building all day finally breaks. His cock swells impossibly thicker inside you, veins pulsing against your rippling walls, and then he’s coming—hard, deep, and completely without restraint. The first thick rope erupts straight against your cervix, hot and forceful, flooding your waiting womb with potent seed. He groans long and low, hips jerking involuntarily as spurt after powerful spurt follows, each one driven deeper by the grinding of his pelvis, painting your insides white, claiming every inch of your fertile core.

“Take it… take every drop,” he pants, voice ragged with ecstasy and triumph. “Get pregnant for me… stay a girl forever… carry my baby.”

He stays buried to the root the entire time, refusing to pull back even a fraction, making sure nothing escapes, ensuring every pulse of his release is delivered as deep as possible. Your pussy milks him greedily in your sleep, inner walls rippling and squeezing, drawing his cum deeper as if your body is eager to conceive. He can feel the warmth spreading inside you, the subtle give of your cervix yielding under the pressure of his load.

Only when the last shuddering spurt leaves him does he finally still, chest heaving, cock still twitching faintly inside your thoroughly bred depths. He remains pressed flush against you, plugging you full, a satisfied growl rumbling in his throat.

It’s done. No going back now. You’re going to wake up tomorrow with his cum still leaking out of you… and, if he has anything to say about it, with his child already taking root. The transformation is going to be permanent—and he wouldn’t have it any other way.

As the final shudder ripples through him, he stays pressed deep for a long, breathless moment, savoring the warm, rhythmic flutter of your walls around his softening cock and the knowledge that every drop of his thick load is sealed inside your womb. Then, slowly—almost reluctantly—he eases his hips back. The wet, obscene sound of withdrawal fills the quiet room as his spent length slips free inch by inch, your pussy clinging greedily until the flushed head pops out with a soft, slick noise.

He shifts to his knees behind you, chest still heaving, and watches in rapt fascination as the evidence of what he’s done begins to appear. Your swollen, well-fucked folds are flushed deep pink, glistening with a creamy mix of your arousal and his cum. Almost immediately, a thick pearl of pearly white escapes your stretched entrance, sliding lazily down the seam of your pussy before dripping onto the sheet in a slow, viscous trail. Another follows, then another—his seed leaking out in steady rivulets, pooling between your thighs and staining the fabric beneath your hips. The sight is mesmerizing, proof of how thoroughly he bred you, how deeply he flooded your fertile body.

But as the haze of orgasm fades and the cool night air kisses his sweat-slick skin, reality creeps in like ice water down his spine. His breathing slows, the triumphant growl in his throat dying into a sick knot of dread. _Holy fuck… I just came inside my own sibling. Raw. On purpose. I tried to get her pregnant. _The words echo in his clearing mind, each one heavier than the last. Guilt, panic, and a twisted shard of lingering satisfaction war inside him as he stares at the creamy mess still oozing from your **** body.

He quickly tugs your panties back into place with trembling fingers, pressing the fabric gently against your leaking pussy in a futile attempt to contain what he’s done. Then he pulls the sheet up over your hips, covering the evidence as best he can. Heart pounding, he slips off the bed, pulls up his sweatpants, and backs quietly out of the room, closing the door with a soft click.

Back on the couch, he lies rigid under a thrown blanket, staring at the dark ceiling. Maybe she is gonna think it was just an exceptional wet dream... maybe she won't even notice? The prayer loops desperately in his head as exhaustion finally drags him under, the scent of sex still clinging to his skin and the memory of your body milking him burned forever behind his eyes.