Your brother breeds you thoroughly

She's mine tonight, he thinks, hand turning the knob slowly. No holding back this time. I'll touch her everywhere, fuck her hard, breed her deeper. Make sure that womb is overflowing with my seed.

He eases the door open, moonlight spilling across your bed where you lie sprawled on your stomach, one leg bent at the knee, ass slightly raised under the rumpled sheets. The loose t-shirt has bunched up around your waist, exposing the black G-string nestled between your plush cheeks, and your breathing is slow, utterly still—no twitch, no awareness. He closes the door behind him with a soft click, locking it just in case, and approaches the bed, stripping off his shirt and sweatpants as he goes. His cock is already rock-hard, throbbing with need at the sight of you.

He starts slow, savoring the freedom the pills give him. Kneeling on the mattress, he runs his hands boldly over your body—palms sliding up your bare thighs, squeezing the soft flesh, fingers tracing the curve of your ass before hooking under the thin string of your panties and tugging them aside. No stealth needed now; he gropes freely, one hand cupping your mound, feeling the lingering slickness from earlier, mixed with the creamy remnants of last night's load. "So wet already," he whispers hoarsely, dipping two fingers inside you roughly, stirring the thick mix and drawing a faint, **** sigh from your lips. He explores your breasts next, shoving the t-shirt higher to expose them fully, pinching and rolling your nipples until they stiffen under his touch. God, she's perfect—soft, responsive even in sleep. Gonna fuck you so hard tonight, sis. Breed you like it as always intended.

Satisfied with his touches, he positions himself behind you in prone bone, just like before—but rougher this time. He spreads your cheeks wide, aligning his thick cock with your slick entrance, and thrusts in hard, bottoming out in one brutal stroke. The wet smack echoes in the room as he buries himself balls-deep, your pussy clenching instinctively around the invasion. He doesn't hold back, pounding into you with forceful, rhythmic slams—hips crashing against your ass, the bed creaking under the intensity. Your body rocks forward with each thrust, face buried in the pillow, but you don't stir. The sensation is intoxicating: your inner walls gripping him tightly, the creamy slosh of old cum mixing with fresh arousal as he fucks you raw. "Take it," he grunts, gripping your hips hard enough to leave marks. "Gonna fill this pussy up—first load right here." The pressure builds fast, his balls tightening, and he slams home one last time, erupting deep inside with a low groan—thick ropes pulsing against your cervix, flooding your womb as he grinds to ensure every drop stays put.

He pulls out slowly, watching a trickle of his fresh cum ooze from your stretched folds, mingling with the old. But he's not done. Breathing heavily, he rolls your limp body onto your back—your legs flopping open naturally, arms splayed above your head. In missionary now, he lifts your thighs over his shoulders, folding you nearly in half for maximum depth, your ass lifted off the bed. Your breasts bounce heavily with the adjustment, nipples still peaked from his rough handling. He slides back in with a rough shove, the new angle letting him spear straight into your core, cockhead battering your cervix relentlessly. He leans forward, pinning your folded legs wider, groping your tits hard as he ruts into you like an animal—wet, obscene slaps filling the room, your body jolting limply with every savage thrust. The view is perfect: your flushed face slack in sleep, breasts jiggling wildly, pussy stretched taut around his girth, creamy froth coating his shaft from the mixed loads. Fuck, look at you—folded up and helpless, taking it so deep. This is how you breed a girl proper, straight into the womb. He varies his pace—long, grinding strokes that stir everything inside you, then short, brutal jabs that make your **** body quiver. Sweat drips from his brow onto your chest as the pleasure coils tighter, his grunts growing louder. The orgasm hits him like a freight train: he buries himself impossibly deep, hips locked flush, and explodes with a strangled growl—hot, forceful jets erupting directly against your cervix, pulse after thick pulse flooding your folded depths, the angle ensuring it has nowhere to go but straight into your womb. He holds there, grinding through the aftershocks, feeling your walls flutter weakly around him as if milking every last drop.

Finally spent, he pulls out slowly, panting, and watches the overflow leak from your thoroughly used pussy—a thick, creamy mess staining the sheets and your thighs. He just deposited an ungodly amount of sperm inside you. There is simply no way you will chalk it up to hormones again the next morning, but by the time you find out what's been done to you it'll be too late. He tugs your G-string back into place to trap as much as possible inside. Your skimpy underwear tries its best, but it simply cannot contain the massive load of fresh semen flowing our of your canal. Your brother pulls the sheet over you, and slips out quietly, leaving you to sleep through the night—irrevocably bred multiple times over, the transformation now inevitable, your body holding the undeniable proof of his repeated claim. In your deep sleep your body unconsciously slightly shifts your hip to let your brother's sperm conquer your egg...