If Jen could cry, she would have. All of her hair laid in a pile under her head. In its place, except for her ears, nose, and mouth, her head was covered entirely in dozens of blobby eyes. Everything was too bright, too blurry, but she couldn't close her eyes. Then the changes hit the rest of her face.
She felt her jaws dissolve, her mouth becoming a jawless hole surrounded by sharp, serrating teeth. Her sweet-tasting, thick saliva poured from her gaping mouth, as she found it impossible to close. Her ears became holes, while huge sensitive antennae grew from her forehead, between a few of her sac-like eyes. Her nose expanded like an elephant seal's, pushing some of her eyes around as it created a huge resonance chamber. It was smaller than her ideal mate's, but she wasn't the one who had to show off, only decide. Wait, her ideal mate? What the fuck was happening?
Her fat neck puffed up in an attempt to cry. Her new nose made it sound like a trumpet.
"Well, I'll be downstairs when you decide your royal highness is ready!" her mom said, turning and leaving her room.
How am I gonna get out of this room? she asked to herself. She could see her torso expanding behind her, and she was almost as tall as she had been, just laying here. She heaved her torso around, her arms nowhere near the ground anymore as her swollen boobs dragged on the ground. She felt absurdly heavy. If she had lungs anymore, she was sure she'd be hyperventilating. She began to instinctively push her torso forward segment by segment. Moving even a meter forward was exhausting, and it took a while for her movement to reach her final segment.
While she was distracted by the changes to her head, Jen failed to realize just how many segments she'd gained. She had to be close to 30 feet long by now, her "ass" pressing against the wall behind her. Soon, as even more segments grew in, she felt it crush the wall with her weight. Suddenly, she felt dizzy, and her room was... different. Bigger.
It was like a warehouse. She knew it was attached to her parents' house, but the room seemed impossibly huge. As she marveled at the ceilings, she soon realized they seemed to be getting closer. Her body was getting bigger, and quickly. She bellowed.
The doorframe in front of her seemed smaller and smaller as she rose. Soon she had to be almost 15 feet off the ground, where she seemed to finish growing. Segment upon segment grew behind her, impossibly far. By the time felt them stop, she guessed she was almost 200 feet long, and easily 25 feet tall. Her middle segments were gigantic. She felt them spread on the cold, hard floor, easily 30 feet wide. How was she supposed to go to school?
She slumped forward, her head resting on her gigantic, soft breasts, as she contemplated her new huge existence. She also realized she was insanely horny. She needed to breed, to infect her mate, turn them into her ultimate partner. This thought, no, primal urge, gave her the motivation to get moving towards school. She was officially an extraterrestrial species exchange student, but she was here for ulterior reasons...
Her mouth expelled a huge amount of the saliva, and it flowed down her breasts onto the ground. As her segments pushed forward, it gave them the lubrication to make movement easier for her heavy body. She lurched forward towards the huge hangar doors, occasionally pushing more of the slime out of her gaping maw.