The side effects weren't severe, not in the literal sense. It depends on someone's definition. For Amy, who should be eight feet tall, after growing a foot in a short time, then her bathtub filling exploits weren't much to be concerned about. Amanda, however, wasn't so sure after their last romp left her bloated for hours. At the cost of a class to boot.
"I'm just saying, it's a bit much," Amanda said on their way to the science division, where they'd agreed to meet Eliza.
"We'll just have to be careful next time. And maybe get waterproof sheets? You're sure Eliza didn't make you some super stretchy potion or something?" Amy inquired, hopping along. She hadn't grown in the past two days, though she didn't need to with her voluptuous figure, exaggerated by her petite stature, which did wonders for her cock. It was a miracle she didn't knock someone over with the bulge alone.
Amanda groaned and stretched. She hadn't given much thought to it, but her body was sublimely elastic. Not just the skin, but her joints were more flexible than ever, like she was a top tier yoga instructor, and her organs among other things too. Just the fact she handled Amy for long as she did spoke volumes, though her new production was too much. Maybe it was worth talking to Eliza about it.
"No, Amy, but we'll ask. Bet she'll be surprised," Amanda said with a gesture between their height difference, with her taking the advantage.
"I'm more worried she'll be upset," Amy sighed, "She's too big for most people, so we had a little 'arrangement'."
"Come to think, I've never seen her dick. Just the bulge. Doesn't look all that big to me."
"Trust me, it's..." Amy smacked her lips as if tasting superb wine, "Exquisite."
"Okay, Cock Connoisseur, I'll take your word for it."
"Don't call me that. It makes me sound like a villain."
"Oh, the futa that happily makes me miss important classes to be her cum tank, is a good guy?"
"Well... ante-hero?"
Amanda shook her head and led the way into the building. It was an overcast day, leaving the sterile halls with a dull sheen. Most students were away, as per Eliza's preferences, though a couple meandered around. In the main lab, Eliza sat at her usual workbench, overlooking multiple tablets while she sipped at her coffee. She had her hair pulled back, the braid draped over her shoulder and pointing at her modest bust.
"Yo, Eliza!" Amy called as she strutted in, coming to one of the many tables, which she couldn't see over without jumping. Even the stools were taller than her now.
"Hey," Amanda said, less exuberant.
"Just a moment," Eliza finished her work and propped her glasses up to see them, then wiped at the lens, before rushing at them, "What the fuck happened?!"
"Cool, we're the same height," Amy giggled, "It's nothing serious. Just shrunk is all."
"Yeah, but you should either be a couple inches, or a couple feet at best. Not... Jesus, your tits are still huge," Eliza said and calmed her breathing, then started on analysing the former Amazon, inquiring as to what led to such a strange turn.
"She used the two-inch formula, then she started growing and wound up like this. It's been a couple days, but nothing else changed. Although she did use that 'ultra cum' formula, as she calls it," Amanda explained.
"Hmm, I should probably name them myself from now on. I need to run some tests, but nothing seems out of the ordinary, aside the obvious. I suppose you're not as spacious as before too," Eliza noted and left to retrieve her equipment, a sour pout on her face.
Some blood and saliva samples were taken, as was her heart rate, but nothing would show up immediately. For the meantime, Amanda enjoyed being the tallest person around, though she doubted it would last very long. Amy had a habit of surprising people. She also tried sizing up Eliza's cock, though its bulge never looked that impressive. Sometimes she envied Amy's nonchalance toward life, then she could just up and ask about it.
Her face betrayed her, as Amy smiled, "Hey Eliza, how big was your dick last time we measured?" The scientist jolted at the question, almost spilling equipment.
"Think it was, hmm, fourteen inches?"
"Fifteen."
"Oh yeah," Amy wriggled her brows at her girlfriend, "And how thick is it?"
Eliza glanced at Amanda, cheeks scarlet, "Eight inches."
"And that's diameter, by the way," Amy said, proud as if she had proven a ridiculous point. Still, that's impressive, Amanda thought as she tried, and failed, to avoid Eliza's crotch. That made her bigger than Amy was. No wonder she didn't sleep around often; Amy's Amazon pussy might be the only thing that could handle something that thick. Although, her own snatch might. If the chance arose, she'd get into those pants.
Still blushing, Eliza worked through all the tests she could, while Amy and Amanda kept her company.
"You know who we should see after this? Yuri." Amy said.
"Oh god, she'd freak," Amanda chuckled and imagined her newly petite lover next to the largest woman, Amazon or otherwise, they had met, "Shame her cock wouldn't fit in either of us right now."
"Excuse me," Eliza said, appearing between them.
Amy jumped and almost fell from her seat, "Shit! Don't sneak up on me like that."
"How the hell did you do that?" Amanda asked.
"Are you talking about Yuri Vasiliev?" Eliza inquired, ignoring their reactions. Her blush had vanished, replaced by focus intensified by her sharp glasses. Amanda glanced down and noticed that the scientist's bulge had swollen.
"Yeah, we met her at my last modelling gig. Fuck, I need to tell Joanne about this before she sets me up another one."
"Nevermind that," Eliza said and grabbed her by the shoulders, calm and still as a glacier. She, then, started shaking Amy fiercely while she screeched, "Why didn't you tell you met her?! I wanna meet her! You better make it up to me! An autograph or something! Anything!"
"Calm... down..." Amy said and extracted herself from the crazed futa.
"Sorry, it's just that I'm a huge fan of hers."
"Yeah, I can tell," Amanda teased with a sly nudge to her friend's throbbing groin. Eliza sighed and made a shooing motion.
"Just go. I can sort this stuff out on my own."
"Aw, don't you want to try my smaller pussy?" Amy cooed, "Amanda's one is pretty stretchy too. It might even fit you."
"Don't tease me," Eliza groaned.
"Actually," Amanda pulled out her phone and went through the contacts, finding Yuri's number, "How about we try making it up to you now?" The look on Eliza's face went beyond excitement and anxiety. She steadied herself on a bench as her footing wavered, that impressive bulge demanding sustenance. Amanda could only imagine her reaction when Yuri showed up.
Should she call them, Yuri fretted in her American apartment. No, no. That'd be too out of character for her, but they hadn't so much as texted her since that wonderful day. Masturbation just didn't cut it anymore, not when her cock remembered, in obsessive detail, the feeling of a vagina around it. Her growth didn't make things easier, as her libido and prostate overcompensated for the added mass. She was so close to snapping every day. Just yesterday, she almost propositioned another model.
That Amy had done wonders and razed her decades worth of discipline to rubble. She was the reason Yuri lingered in town, despite having a job in Europe just days away. Bags packed, tickets booked, but she kept procrastinating that final step in favour of staring at her phone. Just call them, she thought at herself. Her thumb hovered over Amy's contact, shook as if pulling against an anvil, then all her willpower evaporated. She collapsed against her pillow with a huff.
"Why am I such a coward?" Yuri asked the bedroom. The apartment was designed for her, a gift from an agency after she broke their impressive sales record, and everything was appropriately scaled for her stature. Most places she visited had hotel rooms booked for her, but they never felt as comfy as this place did. Even queen-sized beds felt small for her.
Her phone hummed to life. She jumped in shock and almost flung it across the room, cursing in Russian, "Holy fuck, shit, ass..." Once she calmed down, she checked the ID; 'Amanda'. Yuri gulped, repeated a short prayer in her head, and answered.
"Hello?"
