Kim shrinks all your friends

By: Cheese111

"I'm not so sure about that..." Kim muses to herself more than anything else, but it raises a curious brow on both you and Becky. Your sister was planning something. First things first though. All that sexy action had primed Big Willy for another volley and Mike grunted a little as he felt his bowels get flooded. Nowhere near as overwhelming as Becky's huge delivery, but noticeable all the same. When Kim pulled out a small spurt of cum gushed from his stretched asshole. He fell to his knees, looking only slightly more dignified than the rest of your friends. "I'll be right back." Your sister says with a seething malicious undertone, idly playing with her softening cock as she leaves the tent.

"Now it's just you and me, little Willy. I don't know what your sister has in store for these little boys, but we both know they're not good for much else anymore. Especially when I..." She couldn't even finish her announcement before the next growth spurt arrived. You shudder and twitch as you get to feel it directly affecting her huge erection. If it felt tight before, now it was stretching your body to its limits. Had they not fortified you before it would have surely split you in half by now. Your chest felt weird, like the displaced organs were pushing your ribs the wrong way. You had no way of turning around to see how bad things had gotten, but your gut feeling told you she'd gained another six feet.

"Maybe I should fulfill their little fantasies... You know, steal their breath away with a big kiss, sit on them, all those exciting ways to make their end a pleasurable one." She paused to hear your protests, as though you'd suddenly find a way to speak with her cock filling your mouth well past capacity. "Oh, don't worry about it. I'm sure they'll happily lay down their little lives before me. And besides, I'm the only friend you'll be needing from now on, so there's no use keeping them around."

Your heart sank. Whatever vestiges of humanity were present before in Becky had truly left the building. To hear her speak so callously about your friends sickened you to your stomach if the current situation hadn't already done so. Whatever weak squirms you managed to protest this only served to stimulate her shaft. "Oh I know, little Willy, I'm so happy for us too. Soon we'll be the biggest item in school, figuratively and in my case, literally." She giggles with barely restrained glee. Before she can put on the full psychotic laugh Kim enters the tent once more, carrying a tray full of drinks.

"Alright boys and girls, I got you all some tea to settle your stomachs." She put the tray down to a chorus of strained cheers from your friends. They slowly got up on their feet, wobbling still from the huge load sloshing around in their stretched bellies. Kim was quick to grab a cup for herself and Becky, handing your giant girlfriend an almost hilariously tiny cup by comparison. Seeing the result of the latest spurt Kim makes some quick notes whilst finishing her tea.

You wanted to warn your friends. To cry out about the obvious trap they were about to fall into. But your overstuffed jaws permitted no sound to leave. Instead you could only watch horrified as they drank what was no doubt tea infused with a heady dose of your sister's cum-based shrinking serum. Worse yet, the four foot cock impaling you was positively throbbing at the prospect of what was to come next. Kim and Becky patiently waited until your friends had finished their drinks.

Dan was the first to notice something off about the tea. "Hey guys, are any of you feeling a little weird?"

"I bet it's nothing. We all got one of these, so maybe that's throwing you off." Anthony replies, patting his still swollen gut.

Soon though they couldn't help but notice that the solution in their guts was roiling and bubbling intensely. The tent also seemed to be getting bigger. And so were the girls. They cheered together at the now utterly humongous pair that was your sister and your girlfriend whilst you could only watch in horror as they got ever smaller. Either Kim used less serum on them than she did on you or your friends had built up some resilience thanks to their earlier serving of cum, because all of them were around six inches in height where you ended up just half as tall the first time you were shrunk. Either way would spell their doom though, as the horny duo closed in on their new toys like a pair of cats about to pounce.