Walking under the heat of the sun, you find yourself outside the chain fence of a mysterious military base, pristine compared to the wasteland around it. With a reputation of disappearing all who approach and something about a Forced Regression Virus, you cast off all the warnings and pass through a hole in the chain links. Not long after, the sudden beeping then hiss of a gas mine at your feet startles you. Several unwanted breaths of the gas make you splutter and gag for air, your lungs feeling a burst of warmth that spreads into your body. Even as the gas clears and clean air reaches your lungs, the warmth continues to spread, dizziness following in toe. The world spins, you hold your head before losing all balance. You see the blue sky above after you collapse...  

Sometime later, consciousness restarted for you, opening your eyes to the world being so much bigger. Your limbs didn't want to cooperate as you tried to move, weak motions and odd babbles escaping your throat was all you could muster. Even your mind felt like it was in a haze, consistent clear thoughts an effort to make as you looked around. You could see your vault suit bundled on and around you, your Pipboy resting a foot away. Both had grown massive compared to you, all the confusion reaching its peak until a towering figure loomed over you. Gentle synth-like coos rumbled out of a modified female Assaultron, bending forward to stand over you. Her soft tone called out to you, greeting you as her little one before ever so gently picking you up with sun warmed steel hands. Your suit didn't follow you, your gaze catching sight of your now regressed form. That gas had turned you into a baby! The urge to squirm made the Assaultron only grow more maternal, pushing your face against the smooth rubbery embrace of her breast. Your mouth was soon guided over to her warm nipple, the motherly robot enticing you with her milk swollen bosom. Something inside went on autopilot, your mouth drawing in milk without you thinking. Squeezing down her nipple and swallowing droplets of thick, nutritious milk. It felt...Good? You couldn't resist continuing as the urge to struggle seemingly left you for the moment, the Assaultron praising you as you fed. 

It all ended rather quickly as your belly swelled with warmth, the sensation of being full making you stop and be pulled away. A sudden content burp escaped you soon after, the motherly robot gently patting your back. You both exchanged a long gaze, until you felt a sudden pinch on your round belly. It was uncomfortable for only a moment, a soft tube affixing to your belly button that seemed to start from between her legs. You couldn't see clearly, a large round rubbery belly in the way you didn't notice before. The view got clearer as the Assaultron slowly moved into a squatting position, her synthetic neathers now on full display. You started to babble in confusion as she carried you between her high thick thighs, the world turning upside down as she pushed you feet first into her warm vaginal opening. A brief moment of clarity made you start to squirm, she was unbirthing you! Robot hands and the gentle tug of that rubbery umbilical cord eased you into her birth canal. All you could do is watch her moist vaginal lips creep across your legs and belly, the soft, heated walls inside kneading all around you to drag you deeper. Your little arms tried to move, only to be tucked into that hungry rubbery vulva. Over the sounds of little motors, wet squishes and babble was her nursery hum she sang, trying to ease you in physically and mentally. Her swollen labia and growing underbelly filled your view, your form quickly disappearing from the world and into the artificial reproductive system of some strange Assaultron.  

Contractions pulled and pulled, lubricant dripping down and around you until the heat of her lips swept over your head. Crowning, the labia around you convulsed with one big motion, her neathers swallowing you up completely into her birth canal. It all went dark, surrounded by odd mechanical noises, sloshes and wet squishes. All you could do was faintly wiggle against the kneading, moist walls as you were slowly deposited through her body and into space filled with warm, viscus fluid. Some point after your legs and belly were free of the grip of her canal, the urge to breathe was replaced with an odd sensation in your belly. Only after your head passed through the thick ring cervix and you were left immersed and firmly held inside the motherly robot did you notice how thick the umbilical had become. Air, blood and nutrients cycled between her and you, as you pushed around the amniotic fluid filled sack. Whatever else that was being pumped through your connection seemed to speed up the fog passing through your mind, making memories fade into an abyss of baser instincts. Desires for warmth, food, comfort, needy affection, protection...Your conscious thoughts were fading fast during the last effort to struggle for freedom. Your weak pushing out met with two firm hands rubbing back and the muffled sound of the mother-bot talking to you. A muffled voice that grew more and more appealing to your changing mind. Soon you couldn't help but give up and return to a fetal curl, gently swaying inside your new mother's belly as she returned to the base, passenger in tow. You would join many others who found themselves tucked away inside the bellies of Maternal Assaultrons.

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