Chapter Text
You wake to sterile white light humming above you, your body feels too heavy to move. Cool metal cuffs are snug around your wrists and ankles, locking you into a reclined, padded chair. It’s uncomfortable and for sure inescapable.
A glass dome hums quietly overhead. Through the curved transparent walls, you see some shadowy figures. But they're too tall, too weirdly shaped for a person. You’re not on Earth anymore.
“Ah… she’s awake.” The voice is deep, smooth, clinical and tinged with excitement. “Subject 17. Female. Slender frame. History of restrictive eating… excellent.”
Your stomach clenches. Not from hunger, but from dread. You try to sit up, but the restraints tighten gently. It’s a reminder that you’re not in control here.
From the side of your chair, a tall figure steps forward. It doesn't look human, it's like nothing you've ever seen before. He wears a lab coat, but his eyes are silver and pupil-less, and his hands are too long and graceful.
“You’ve been selected for our gastro-expansion trial. We’re studying the physical limits of the human digestive system. Particularly how much pressure the abdominal cavity can endure before neural shutdown. Don’t worry…”, A cruel little smile tugs at his lips, “You’ll be quite safe. Mostly.”
Your heart races at his words. A mechanical arm lowers beside you, holding a sleek device shaped like a feeding tube, but far more advanced. Without warning, it extends, slipping past your lips and down your throat with smooth, non-painful precision.
You try to pull back, gag, resist, but your body betrays you. The moment it clicks into place, a cool, tingling sensation spreads through your chest.
“Round One: 500 milliliters, nutrient gel. Warming… now.”
You feel it immediately. A thick, warm fluid slides into your stomach. It’s slow at first. Almost pleasant. But then the pressure begins.
The sensation is surreal. Your belly starts to rise, gently but undeniably stretching outward. The gel is dense, engineered to expand once inside. You feel your waistband tighten, then press painfully as your midsection swells against the restraints.
“Hm, Impressive. 24% abdominal distention already,” he murmurs, tapping at a floating screen. “Most subjects begin moaning by now. She’s tolerating it quite well.”
You’re not moaning… yet. But your breathing is faster and your skin starts to feel hot. Your previously flat belly is now firm and rounded under your shirt. You whimper, trying to wriggle, but every small movement makes you more aware of the incredible tightness.
“Let’s increase volume. 750 milliliters. Begin infusion.”
More?! The warmth floods your core. You groan painfully as the weight in your stomach becomes undeniable. Your skin stretches tight. The belt of your pants digs in painfully. You’re bulging now, visibly round, like you’ve eaten three huge meals back to back.
“There it is,” the alien scientist coos with a grin on his face. “That beautiful helplessness. Look at her… poor little human, so full already. And we’ve only just begun.”
The fluid keeps coming. You body keeps changing and growing with loud gurgling sounds. Your belly swells over your waistband now, taut and flushed. A thin film of sweat beads on your skin. Your hands clench the armrests, wrists bound, as you let out a breathless gasp.
“Should we test pressure tolerance?” he muses aloud. “I believe it’s time for the abdominal bind.” A mechanical arm descends with a wide, elastic strap. It wraps around your stomach. It sits high, just below your ribs and it tightens gradually, making you choke on a sob. The pressure is a lot to handle, almost overwhelming.
“Still conscious. Still responding. Excellent” he notes, looking back and forth from your body to the monitor.
Your belly is very big and unrecognisable now. Your previously baggy shirt now clings to every curve. Every breath feels like a battle. Your thighs twitch and your hands are tight into a fist. Your mind is hazy, overwhelmed, afraid, but also… aroused? You’re undeniably addicted to the pressure. It’s confusing. You thought one of your biggest fears was to gain weight, but somehow, you're surprisingly calm.
“We’ll let you rest for now. But in two hours…” he leans in, his breath cool against your ear, “Round Two begins. And we’ll double the volume.”
You groan, part horror, part hunger as the restraints loosen just slightly to accommodate your swollen form. You’re not sure you can take more. But you’re also not sure you want him to stop.