“Me first, me first,” cried Megan, rushing towards the rest of the pills.
“Hold on,” said Erin, “you’ve had enough.” She wrapped an arm around Megan and easily pulled her into a bear hug.
“No fair! If you get more, I should get more!”
“I have your brother’s permission. You stole the pills without knowing what they were and shared them.”
“Come on, Joe! Make her let me go! Let me have some more!” whined Megan as she struggled against the 10 foot Erin.
“Yeah, Joe, make me let her go,” said Erin mischievously as she looked down on her boyfriend from the ceiling.
“Megan, Erin’s right. Plus she has around 300 lbs on me, so I can’t really make her do anything.” said Joe. “Whereas I can ask her nicely to do something for me.”
“What did you have in mind?” said Erin slyly.
“Wait a sec while I grab the pills. Then all three of us can go upstairs and I’ll lock the doors so there won’t be any more surprises.”
Joe grabbed the rest of the pills and signaled for Erin to go ahead with Megan. Erin smirked at Joe, knowing exactly why she was going before him. Still holding the squirming Megan, Erin turned around and started crawling to the door, her massive round ass jiggling every step of the way. It looked like she might have trouble fitting through the door, but her cheeks barely squeezed through as she started up the stairs. Joe locked the door and hurried up the steps, catching up to Erin to make sure he missed as little of the show as possible. He noticed that her tattered panties were wet, showing that she enjoyed her new size as much as he did. He had had an erection since she started growing and it didn’t show any sign of going down. Anticipation for what would come next kept him harder than he’d ever been in his life.
Joe locked the door at the top of the steps, trusting the redundancy to help keep Megan away from his other projects in the basement, unfinished as they may be. Erin continued to keep Megan in her arms and away from the door as he took care of the door, seeing as Megan was nearly as tall as Joe and could possibly overpower him.
“So what do we do with your sister?” asked Erin once the door was locked.
“You can let her go, but take these keys,” answered Joe, “put them on the roof or somewhere where only you can get them.”
“This is so unfair!” cried Megan, dashing out of Erin’s reach, “You’re just a couple of bullies!”
“Yeah, I’m a big bully aren’t I,” grinned Erin.
“Come on Erin, let’s go outside and get on with the testing.” said Joe excitedly.
“Love to,” said Erin as she crawled toward the backdoor, treating Joe to another magnificent view of her rear and nearly getting stuck in a door again.
Once in the back yard, Erin waited on her knees for Joe so he could get the full impact of just how huge she was. She started on her hands and knees, looking Joe straight in the eye. Then she lifted her hands and went back on her knees, sitting on her feet and spreading her knees apart, displaying her wet see through underwear for him. When she felt his gaze had lingered long enough, she got to her feet and slowly stood up, savoring the change in perspective and imagining that she was growing again. She easily reached up and put the keys in the gutter to keep any surprises from happening and then struck a pose, flaring her ass out and putting her hands behind her head. Joe’s head only came up to her mid-section, his eyes bulging, looking like a deer caught in headlights, fully taking in just how well his experimental pills had worked.
“Oh my god,” said Joe.
“Goddess,” corrected Erin, looking down at him. “Now, for the main event,” she said, holding out her hand. Joe wordlessly put a single pill in her had.
“Only one?” she said.
“It will be easier to track progress this way,” said Joe, “plus, I want to have some fun before you get too big for me.”
“So selfish,” Erin said, popping the pill into her mouth and swallowing. Within a few minutes, she flinched, signaling the start of her growth. She resisted the urge to bend over while she trembled and spasmed, growing faster than her first time. Her breath came quicker and quicker as her head climbed higher until she could see into the gutter where she placed the keys. The blades of grass in the backyard tickled her feet as they stretched and expanded, growing out of her straining socks. Her struggling bra and panties finally gave up and snapped off of her, displaying her amazing ass and soaking vagina. She reached her hands down and started playing with herself, tweaking her nipples and rubbing her labia, reveling in her new size. Joe could now walk through her legs without having to worry about bumping his head and estimated that she grew an additional 3 feet, making her 13’1”.
“Oh my goddess,” said Joe, amazed at the towering woman in front of him.