You ran inside, eager to catch a glimpse of your little sister Tina, who had taken pills that would increase her breast size and grow her ass too. At the moment, Tina had almost no chest to speak of, although her butt had a decent shape to it due to her constant workouts. She always complained about having no boobs and being the smallest in her class, so it felt right to give her a boost in the right direction.
Walking into the front hall of your house, you saw a nice round butt, stuffed into some tight booty shorts, bending over. Maybe Tina wasn't home, you thought. Maybe it was just a stranger. But the girl stood up and spun around -- it was Tina, but she was about 4 inches taller and looked like she was 16 or 17 thanks to the new assets on her chest. She had grown boobs alright; the pills had worked their magic on her and she now had decent sized B or C cup tits. You gawked at them and Tina laughed. She started explaining something about how they "just started growing" but you weren't really paying attention because you were too focused on her boobs. Tina had boobs! They even jiggled a tiny bit whenever she made any sudden motion. Her clothes fit her poorly now because her shorts were too tight on her enlarged ass and her shirt had turned into a crop top, only coming to her midrift.
You looked at Tina's face and she really looked older - her features seemed more mature... she had light blue eyes, sandy hair that fell to her shoulders and very prominent lips, which featured a charming smile. "I wonder if my growth has anything to do with Mom's?" she said, after a few minutes.
"Do you, uh, like your growth? Do you like being bigger?"
"Like it? I LOVE IT!! I wish I was even bigger! I'm probably about 5'5'' now, imagine if I got even bigger! Mmmmm that would feel so good!"
For a split second you thought about telling Tina about the growth pills Karen had been taking and you had given her without her knowing, but you thought better of it. If Tina wanted to grow, who were you to say she couldn't?
Tina mumbled something about going to go downstairs to workout and lift weights. You went upstairs and heard the shower running in your mom's room and Karen singing a song from within. You snuck in and empited all three bottles into your hands -- in total there were three height pills, two BE pills, and two AE pills left. You ran downstairs and went to the kitchen to whip up a cocktail for Tina... a "post-workout shake" you thought. Crushing the pills all into the drink, you suddenly remembered the warning on the pill bottles not to have more than two of each pill daily.
It probably won't hurt to have a little extra...growth... you thought, with a smile. You imagined Tina as tall as your mom, squeezed into a tight bikini and the three of you living together, in a growing household, getting closer to each other, in more ways than one.
Downstairs, Tina was doing some squats and you were surprised by how much she was lifting -- she was up to almost 100 lbs! Her derriere looked bigger with every squat she performed and Tina was probably loving her booty gains and the effect it was having on her handsome older brother. You couldn't help but stare as your sister's ass wobbled and bounced around her tight tight shorts. You wondered what kind of panties she was wearing, if any at all.
"Is that for me, big bro?" Tina asked, swaggering over. Without your answer she took the drink and gulped it down greedily. Her eyes shone, almost lustfully.
"Back to the weights," she said, "Time to Grow!"
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