The cutest isopod you'll ever meet

That first night, you feel a heat in your perineum. It seems to spread throughout your body. Your nipples and cock get so sensitive. You try touching yourself, turning over and rutting into the mattress below, but it's not enough. You gather the small amount of precum from your aching cock and rub it against that new heat.

You feel it, the desperate need to be filled. It’s primal and raw. Fumbling for the lube nearby, you hastily spread it over your fingers and prod at your hole. The intrusion is too much, too quickly, but it feels so, so good to be filled by something, the cold lube soothing this new heat even as the stretch burns.

Slowly, though, the heat starts to come back. You rock onto your fingers in desperation. Curling them into your prostate is enough to imagine the press of something deeper inside you. You come, and it's more blinding than any climax you've ever reached before.

Exhaustion overtakes you, and when you wake up minutes later to the feeling of cum against your belly, pooled in the sheets, you feel something's changed. Your other hand reaches between your legs, to that heat-filled spot, and feels the small slit that's begun to form. Your hips buck instinctively. Quickly, you scoop up your cum with a couple fingers and rub it into that oversensitive opening. The new flesh quivers against your fingers, opening for the slick spend, trying to take it all in.

Thrusting your cum-slick fingers deeper, you can't help but shake with how sensitive your new insides are. After you manage to take in everything you can, you feel satisfied and drop back off into sleep.

When you awake the second time, you're fully rested and ready to clean off. As you stand, your own semen leaks out of your new pussy. You instinctively draw your legs together, hurrying to the bathroom. When you get in the shower, you rinse off everything, including the alien's secretions.

That seems to be a mistake. You're hit with what can only be described as withdrawal, and you find yourself dizzy with the need to be fucked and filled. If only that alien could come back and leave its secretions inside you so you would never need anything like this ever again...

Absentmindedly, you grab the handheld sprayer and turn it up to the most intense jet setting. The feeling of it hitting your open pussy is too much and too little at once. You can't help but cry out, the sound echoing through the ship's vents.

As soon as you make it back to your bed, you drop onto it, face-down, still damp and naked. The heat is too much, too much, too much. Soon enough, you hear something in the vents above. Before you can react, the alien crashes through and falls atop you. The feeling and smell of it is familiar. It feeds into that new, hungry heat.

You find yourself arching up into the monster, crying desperately. It seems to orient itself then. Foreign limbs grasp your hips, then your thighs, pulling them apart sharply, back toward it. The cold air against your pussy makes your insides pulse desperately.

Something hot and slimy drags across it, oddly relieving. You push back, now desperate for this new heat. The creature makes a sound that’s almost a purr. It sends vibrations through your pussy, and you realize the new sensation is the creature’s tongue. Before you can think on it any more, it thrusts its tongue inside, filling you properly at last. It undulates, slow, deep, expanding you in all the right ways. You rock your hips to the same rhythm.

Before long, your pussy’s stretched open, nice and easy. The alien pulls back then, leaving you wanting. The pathetic, needy sounds you let out cause the creature to tighten its hold.

Soon enough, you feel something harder nudge at your entrance. The alien rumbles near your ear now. That same tongue from before winds down against your neck. The creature presses the first few inches of its cockhead in. You arch desperately into the large form covering you. That needy movement seems to send any control the creature had maintained out the window. It sheathes itself inside your heat with one, harsh thrust. Its shaft feels ridged, almost exoskeleton-like, yet smooth. Almost certainly the length of your forearm judging by the way it stretches you to your limit.

The tip pressed deep inside your canal. It seems to be trying to create another new opening with the way the alien thrusts, hard and shallow. You feel its cock release something that starts that desperate heat back up inside you. This itch, you can’t scratch on your own though. But you don’t need to. The creature keeps nudging against that spot, and soon enough, you feel something start to give, open up.

The alien seems to feel it too, going still for a moment. Then it starts up its thrusting again. This time, it pulls out farther, ridged shaft almost too much for your sensitive cunt’s walls to handle. Clutching the bed sheets tight, you drop your upper half to rest completely on the mattress and relax your hips so your cunt opens up just little bit more. The alien manages to spread you open enough to fit a few more inches of its length. Once again, you feel its cockhead nudge into that deep spot.

Something begins to yield, and the alien presses deeper, thrusts hard and slow. It gives one last thrust and keeps pressing forward. An ache starts to form there, a more urgent need building up. The creature clamps down on your neck and gives one last push. Its cockhead, tapered just for this purpose, pushes into your brand new cervix. You clench around the intrusion. The orgasm rolls through you as you feel the creature’s cock pulse, expanding until the stretch verges on too much. The alien can’t pull out now, and you can’t stop shuddering around its full shaft with pleasure. Heat floods your new uterus. The creature begins thrusting shallowly as it fills you up the way you’ve always needed. There’s a new weight in your abdomen, warm and fulfilling. Your cock leaks and twitches against the sheets. It’s oversensitive, but you’re pinned down by the alien’s full weight, so it rubs a second orgasm out of you as the monster’s ridged cock presses against your prostate through your cunt’s walls. You’ve never felt so consumed by something.

When the alien finishes filling you, it begins to ease itself out, cockhead catching at your cervix before pulling free. You clench around the retreating length. As soon as it’s fully out, your gaping pussy finds itself flexing around nothing. Cum, or whatever the substance is that you’ve been filled with, starts to slip out. You exhaustedly try to press it back inside. The creature moves faster though, winding more tightly around you and flipping you both upside down. It leaps up to hang itself, and you, from the vent. This position would be uncomfortable if you weren’t so securely cradled as you are now.