The contents of the tank began pumping into her mouth and Raquel noted that it had an interesting spicy-sour tang. It was quite flavorful - certainly not the sort of thing a normal person would notice, assuming they didn't immediately die after ingesting it afterwards, of course - and she could only conclude that her formula successfully altered her palate as well.
Raquel eagerly swallowed it down. Her neck bulged with each gulp, the substance coming to rest where her stomach would be, a dark fluid sphere contrasting with the rest of her body.
Raquel rapidly filled in bursts, her belly quivering with each fit of swelling. Within seconds it was hanging off her frame in a massive mimicry of pregnancy; another moment and the underside touched the ground, the sides extending well beyond her legs.
Raquel punched another button, causing the hum to rise to a whir as she tipped back. She hit the ground butt-first, her body jiggling as its contents sloshed, pushing out her back and sides, reshaping her to a golden teardrop with two legs along the ground, half-buried by a teardrop-shaped body tapering up to a relatively normal-looking upper body, both arms occupied with holding the hose as she stuffed herself with sludge.
As the gallons flowed into her she steadily grew, higher and wider. Inside of her the fruits of her research went to work, fizzing, heating up, combining and separating, forming a swirling cocktail of bubbles and chemicals that would have looked positively ominous through her translucent flesh to outside observers but, she would assure them, were in the process of becoming perfectly safe. That it required her to gorge herself, growing to scales not reached by humans, was merely a minor detail. As were the... unique sensations the reactions were giving her.
As her combined belly, hips, and backside expanded they spread across the room, shoving aside empty barrels and boxes. A few heavier objects stuck partway into her. She frowned around the hose, annoyed by the interference. With a grunt she squeezed her body, rising up before pressing down, widening and flattening with enough force to send the offending objects tumbling away into the walls with a cacophony of banging metal and thumping wood. Her body shuddered and shook from the sudden movement, slowly returning to quivering in time to the flow of the fluid.