Alterations

The tingling sensation that had spread through you seems to reach a critical point, turning into a fire that spreads through every nerve. You try to scream, but no sound emerges as you convulse wildly. It's not pain, or even pleasure, that assails you, but you can't help but feel terror. You somehow knew that, regardless of whether you managed to escape, you would no longer be quite...human. This idea scares you enough to cut through the fog of lust and exhaustion, but you know it's far too late to do anything now.

The rutting of the monster resumes, much rougher than before, as you already notice the first change. What was once pitch blackness begins to show form. Grey-scale images of the world around you appear from the darkness, and you immediately wish they hadn't. Your mind had come up with an image for the thing that was **** you, but the reality was even worse. Three sets of huge, beady, black eyes stared down at you. Mandibles jutted from the sides a mouth that seemed a mass of prehensile tentacles of various shapes and sizes. The chitinous hide of the creature was about as insectoid as you'd expected, only more akin to the layered armor of a centipede than the mostly solid kind on beetle, likely making it extremely maneuverable despite its size.

You already knew the general shape of the three fingered clawed "hands" that held you, the arms joined by a second pair below it that most likely held the other woman. You couldn't see its legs from your position, nor much of its chest behind your growing stomach, but it reminded you of some kind of beetle mixed with a creature out of a Lovecraftian nightmare. The slime it had coated you with covered its entire body, oozing out from beneath the joints in its shell. You caught glimpses of yet more tentacles, or perhaps something else, slithering in and out from beneath its casing, before turning away, unable to take any more.

"Lovely, isn't he?" The woman came into view, likewise coated in slime but her features growing more and more distinct as your sight sharpened. Deja vu hits you hard the moment you see her, but is washed away as you feel the cock in you bend. Your tits burn fiercely, swelling visibly along with your stomach as a third segment is fit in. The cock in you is now curled around like an oversized snake, the creature fucking harder still as the fourth segment makes its way past your cervix.

You finally find your voice, your screams echoing through the chamber as the woman twists your nipples, a warm fluid spraying easily from them. Despite the exhaustion and sedation, you feel a new strength surge through you, your already toned muscles growing more powerful. A strange sensation throughout your body accompanies it as your bones strengthen as well.

The look of fear and wonder draws another giggle from the woman. "Mating with him isn't even close to as hard as carrying and birthing his young. Gotta toughen you up a little." As the fifth segment pops into your womb, your belly large enough to carry an entire person inside it, you begin to feel cramping just beside your bloated uterus. Watching your reaction, the woman continues, twisting your nipples more and lapping at what you are now pretty sure is your milk. "No worries, sweetie. He's just inducing mass ovulation."

The deluge of orgasms that greets a sudden intensifying of the cramping signals the end of at least this round of changes. All concerns are wiped from your mind. The terror at the creature's visage seems to vanish, replaced by an overwhelming need to have him seed you. A cry of joy escapes your lips as you finally begin to feel his body touch yours, the sixth segment of his cock popping into your womb and a large, round ball at the base about the size of a basketball takes up residence in your birth canal.

By now you can't believe the size of your stomach. It had gone from flat to bulging into a lumpy sphere big enough to fit the pregnant woman next to you and more, and you find it turns you on immensely. Your continually leaking tits have doubled in size, and are now heavy with milk. The rumbling click of the creature is joined by a slowly increasing vibration of its cock, increasing your pleasure ten fold. The ball at the base begins to grow rapidly, ensuring you're not going anywhere, as you feel the already massive segments in your womb grow as well.

"Here it comes, sweetheart!" the woman yells excitedly, turning to her, and now your, lover. "Fill her up good, darling!" The moment these words pass her lips, a nearly scalding heat bursts into your womb. The lumpiness of your belly lasts maybe another second before it turns into a perfectly spherical, and rapidly growing, orb. Gallon upon gallon of semen is pumped directly onto your plentiful eggs, and more still comes.

It feels like an eternity, but is probably only a minute or so, before your lover pulls away from you. It's perhaps another thirty seconds before you notice, since you're still getting pumped full of his thick cum. "Oh, my God!" you yell, realizing at last that he's left his cock in you. It's only slightly shrunk even after adding another foot to your stomach's diameter, and shows no sign of stopping.

You're set down onto the warm slime, still filling with cum while the ball at the end refuses to let any of it out. You thank the changes you went through, knowing your spine would probably have snapped from the weight on it now. You continue to convulse with every gout of sperm shot into you for the next five minutes, until finally, mercifully, the flow slows and then stops. You've stopped guessing at the size of your belly, and started wondering exactly how many little darlings you're pregnant with as you drift off to sleep.