Incubator

We've both been stationed on this swamp planet for several weeks now. From the known living conditions, it is suitable for colonization, we have been sent here as a research team to collect various samples and to explore flora and fauna. We are supposed to hold out here for a full cycle, a little less than an earth year.
You can clearly feel that it is now getting warmer, a phase with hot and humid temperatures is beginning. The muggy warm nights make it difficult for us to fall asleep, it is unbearably hot in the tents... We finally move outside, sleep only in shorts on our mats, protected by thin nets. I had a hard time falling asleep that night. I can't have slept too long when I wake up to a slight stabbing and ache in my gut. I grunt and rub my tank when my hand unexpectedly touches something. I widen my eyes in alarm and see something perched on my naked belly. It's one of those animals that inhabit the swamp, and now, as the temperature rises, they're coming out in larger and larger flocks. A strange mix of insect and reptile, about the size of a cat, with sharp jaws and black leathery skin. In the last few days, we have been able to observe many mating. I cry out in horror when I see the beast. The thing rattles and hisses at me, and I realize it's buried a long spike in my belly button. I scream again and hit the animal. It pulls it thorn out of my gut and flees.

You woke up from the noise and rushed to me. "What's happening? Everything OK?"
"There was one of these black creatures..." I look at the net that the animal has punctured with its sharp jaws. "It stung me..." I rub and examine my gut.
"Where? In the belly?”
"Yes, in the belly button..."
You shine your flashlight on my pot, examine my navel. Not so easy, because my belly is big and my navel deep. "It's red, a drop of blood where it stung you. Does it hurt?"
"Nah..." It doesn’t. It itches and swells the navel for the next few days, but it's not much different than a large mosquito bite. After a week I almost forgot, the shock at night was worse than the physical consequences. Despite the sultry nights we now sleep in the tent. I'm just glad the beast wasn't poisonous.
In the following weeks we are making good progress with our work. You get used to the climate; we now have an extensive range of food. This is obviously also noticeable in my waist size, pants and shirts are starting to tighten. I've always gained a bit of weight, so I don't worry too much about it. My intestines probably can't handle everything that this planet has to offer in terms of food either, I feel increasingly bloated and feel a dull pressure in my guts. My belly is getting bigger and bigger, but I like it. It hangs heavily over my waistband and my shirts can't quite cover that huge hairy paunch.

However, one night I wake up with tearing abdominal pains. My gut is so swollen and feels rock hard. Groaning, I roll over, trying in vain to take a relieving posture.
"Are you okay?" I hear your sleepy voice.
"No..." I moan and hold my aching tank. "My gut hurts…"
You come over to me "Let's see..." You push up my shirt and lower my shorts into my groins and carefully touch my unnaturally swollen abdomen. Your face darkens. "I hope it's just digestion." You get some pungent lotion and start massaging my painfully swollen belly gently. I moan and gasp in pain and press my poor paunch into your hands. "That should bring some relief..."
But it doesn't. I feel like the spasms are tearing my insides. The rock-hard belly glows like an oven. Again and again, you touch my still swelling belly with a worried expression. The night drags on endlessly while I can hardly stand the pain. The morning is already dawning when I suddenly clearly feel something moving in my gut under my hands. I scream in panic, staring at the bulging belly shaking with cramps. You're already at my side again, talking to me soothingly, but I don't want to hear anything! I press my hands tightly to my trembling gut. "It is moving!!! Something is moving in my belly!!!” You also put your hands on my big pot – and freeze. I see you can feel it too. The tearing pains in my gut meanwhile start to a cruel crescendo! Howling in agony, I push out my enormous belly. You see in disbelief how my navel begins to bulge outwards. It sits enthroned on my twitching gut like a ball – then it literally bursts open! Pain and panic mingled in a shrill screech of mortal terror as a veritable torrent of teeming black beasts erupted from my belly... The first have already disappeared into the dark, while stragglers are still pushing out of my torn navel. You pluck one of them from the bloody hole and look at it, shaken. It is undoubtedly a diminutive version of the ubiquitous black swamp creatures. While I'm whimpering, with glassy eyes, holding my horribly aching gut, I hear your toneless voice. "It laid eggs in your belly... The brood was able to grow in the warm abdominal cavity - and now it has hatched. They must have been feeding on your guts for the last few hours until they had enough energy to burst out... I'm sorry! I can hardly imagine the agony that caused you...” I stare at you, breathing heavily. "And this agony... is far from over, is it?" You shake your head. “There is no rescue for you, but unfortunately no quick death either. You'll probably die of peritonitis; they'll have perforated your intestines.” “How long?” I moan. You look at me. "It can take days, hours if you're lucky..." I groan and press my hands tightly to my fat paunch in a vain attempt to ease the raging pain.

As I moan and stare at the bloody hole that used to be my belly button, I see torn intestines pushing out of my big heaving belly - and I feel my cock stir. Full of shame I have to realize that my open gut and the realization that I am in agony excites me. I hope you don't notice, 'cause I want you by my side in my pain. It would comfort me if you could hold and rub my poor fat belly.