As morning sunlight streams into your room, you wake up. You prop yourself up with your arms and yawn, scratching at your torso. Something felt *very* off, however. You felt... heavier, somehow. Did your breasts feel that huge when you went to bed? Not to mention the pleasurable rhythmic contractions coming from your crotch.
Prying your eyes open, you look down, and scream.
What lays ahead of you is truly terrifying. Your tits are absolutely gigantic, rivaling basketballs. They press heavily on your torso. However, they pale in comparison to your abdomen. Gone are your abs, and any other semblance of normal humanity. In its place is a swollen mass of flesh, distended and... pulsing??
"WHAT! THE! FUCK! IS! GOING! ON??!!" she yelled, hyperventilating. An androgynous person peeked into her room, and approached the scared girl.
"What's the matter, broodmaiden Jammie?" Did they just say... no...
"B-broodmaiden?" she stammered. What the fuck kind of world have you ended up in?
The androgynous person was saying something, but it sounded distant and muffled. Memories flooded your mind. Remembering how, during school, you learned about mammalian reproduction, which is only of the marsupial variety. Placentas were just not efficient enough to allow survival during the Cretaceous and Jurassic in this universe. Humans, being a highly social species, took this to an even more extreme degree. Convergent evolution with your brothers and sisters, bees and termites, the middle school biology teacher explained., had lead humans to develop a similar type of social stratification. You learned about the 3 phenotypes of humans in society--workers, warriors, and reproducers or 'broodmaidens.' Everyone is born a worker, and 80% of humanity remains 'workers' throughout their entire life. They have underdeveloped genitalia, are generally asexual, and largely androgynous. However, during what little puberty humans undergo, the other two phenotypes emerge. The mechanisms behind selection of phenotype are complex and largely unknown, but it might have to do with population density. Warriors make up approximately 15% of humanity, and are largely responsible for community defense, leading hunts, and may mate with reproducers. Reproducers are the remaining 5%. They are largely sedate, and exist only to create offspring. During puberty, like the warriors, they are flooded with hormones that enact certain changes within their bodies.
For warriors, they become strong, virile, and violent, though they can be incredibly protective, kind, gentle, and loyal, often tasked with the protection of newborns. Like hyenas, warrior women grow large pseudo-penises, while warrior men grow gigantic cocks and fight, often to the death, to mate with broodmaidens. The warrior women also have large pouches, perfect to nurse and raise broodmaiden children. Like warriors, and unlike many other species which utilize this sort of phenotypical stratification, producers can also be both male and female; however, the changes are a bit different. Reproductive men are vanishingly rare, and their mobility is often hampered by their large cocks and constantly churning, absurdly huge balls. They can cum for hours at a time, multiple times a day. Reproductive women are the only people to ever give birth, though generally they do not care for their offspring. They are almost all immobile, reliant on workers and warriors to provide for them. Their reproductive system takes an oversized amount of their energy to upkeep, meaning they spend most of their days eating. The reproductive system also dominates their bodies, replacing much of their body from the chest down.
During broodmaiden puberty, a girl will find walking becomes more difficult, and her legs will begin to weaken. Her hips will expand, and soon she will be incapable of thinking about anything other than sex. She will often drop out of high school, and recede from social life until her puberty is complete anywhere from 20 to 25. During this time, her legs become vestigial, eventually disappearing completely. Her sex drive rises to absurd degrees, unable to do much else beyond gorge herself and jerk off. Her genitalia also swells to comical degrees, displacing much of her internal structure, appearing more like the human equivalent of a termite queen than a human being. So much of her energy will be devoted to the production of human babies that her digestive and renal systems become all but vestigial. A broodmaiden's puberty is complete when her first detectable eggs are produced, noted by a change in the consistency of her cum. At this point, she exists only to create new babies. Some do keep up other hobbies, and most retain their full human intellect, even if most of their interests become sexual in nature. When a broodmaiden's first eggs are produced, it is considered a major milestone, and the day is henceforth celebrated in lieu of her original birthday (generally noted by the first time that a human peeks out from its surrogate's pouch).
You remembered when you first began puberty, the joy you felt when you realized you were going to be a broodmaiden. The other girls you'd gone to high school with were jealous, of course, until you couldn't keep yourself from masturbating in public, leading to you dropping out of school. You'd spent the last few years growing and growing, and, with the production of your first eggs, moved out of your old dormitory to the broodmaiden hostel, where you were waited on hand-and-foot, or, well, hand-and-swollen-pulsating-vaginal-abdomen.
"Jammie... are you quite alright?" The worker asked, genuinely concerned. She snapped back into reality, not sure how long she'd been staring into space. "Would you like some breakfast? I know you broodmaidens need quite a bit of energy, after all!" They said this with a bit of a happy perkiness to their voice, and patted your large, soft abdomen.
"God, fuck, yes, please! I'm starving!" you thought. With a bit more reserve, however, you asked them for a menu, and began to pour over your options.