Moving around the basement, Joe felt something was off. He took inventory of his workspace and noticed that some of his growth pills were missing. Searching around the lab, Joe didn't notice two guests coming downstairs.
"Hey Joe, what are you doing?" asked Erin, his girlfriend.
"Oh, hey Erin,"said Joe, "I'm looking for some pills I've been working on. They were all on this table and either I misplaced some or they fell off. What'd you come down here for," he asked, seeing as she had never come down uninvited before, "and why did you bring Megan?"
"Your sister here gave me some 'candy' that she told me she found down here. Knowing the kind of things you work on, I dragged her down here to find out what we just ate."
"I told you, they're candy," said Megan.
"Megan, those aren't candy and they haven't been tested!" exclaimed Joe, "I'm calling the EMTs, hopefully you haven't poisoned yourself."
"I ate a couple too," said Erin, "Megan didn't tell me where she got them before I ate them."
"Great," sighed Joe, "I'll tell them two people need their stomachs pumped."
"I don't feel so good," groaned Megan, "I feel like I'm going to throw up."
"Don't throw up!" exclaimed Joe, "It could make things much worse."
"I can't keep it in," she said, hunching over. Megan's body tensed and spasmed. She stayed bent over for a few seconds, trembling, then straightened up. "I feel better now," she said, "actually, I feel good."
"At least you didn't throw up," said Joe, "and the pills don't seem to be harmful, but they didn't...," he trailed off as he looked at his sister.
"They didn't what?" asked Erin, looking down at Megan, "Wait, is she taller?"
Megan had been short for her age, but as Joe and Erin had noticed, she was growing taller. She quickly passed four feet and kept growing. She'd worn a sweater and sweatpants, which were tightening around her expanding body. Erin dropped Megan's hand and moved closer to Joe. Megan's growth continued, rendering Joe and Erin speechless. When the growth ended, Megan stood 5'8", two feet taller than when she had started.
"Wow," said Megan excitedly, "no one at school's going to call me short anymore! I'm the tallest kid in my class. I'm the tallest kid in the school. I'm probably the tallest seven year old in the world!"
"They worked," whispered Joe.
"What worked?" asked Erin, overhearing his whisper.
"The pills. They were designed to increase the height of the subject and there don't seem to be any harmful side effects," he explained, "and she said she had two, so that's one foot of height for each pill, but does it depend on starting mass or is one foot per pill constant? Will the effect increase or decrease with increased mass? I need to test more..." he paused as he realized he was rambling. Joe looked at his girlfriend and remembered that she had eaten some pills as well. "How many pills did you have?" he asked Erin.
"Two," she said, "but I ate them a little later than Megan did and..." she broke off, clenching her stomach as the pills started to work. "She's right, it does feel like I'm going to throw up." Erin bent over and began trembling. Now looking for it, Joe noticed that her first spasm had grown her at least two inches. Straightening up, her height was 6'3" and growing fast, faster than Megan had. Her clothes began to stretch across her chest and hips, seams popped and rips began, but her height only increased more.
"Ow, my head," said Erin, colliding with the seven foot ceiling. Erin went to her knees to give herself more room. Even on her knees, she could still look straight into Joe's eyes. Joe watched as her eyes moved up, replaced by her chin and neck, which were quickly replaced by her chest.
"Joe," moaned Erin, as her shirt continued stretching over her chest.
"Yeah Erin?" asked Joe
"I've never told anyone this, but growing this big has been my dream." she sighed as her pants tore and ripped from her expanding legs.
"I've always wanted this too," answered Joe, "That's why I made these pills."
Erin's height continued increasing as her shirt and pants tore to shreds. Her growth stopped at 10'1", her clothes in tatters around her. She towered over Joe, even while kneeling. She looked down and lustily asked, "Do you have enough data, or should we experiment more?"
"I think more testing is definitely necessary," breathed Joe.