Something weird.

As fast as they had glazed over, Lily's eyes returned to normal. With a drawn-out moan of appreciation, she relinquished Anne's thumb and drew back from her mother, licking her lips absentmindedly.

"Mmh, that's tasty... Salty, but tasty..." she mumbled, touching her lips with her right hand. "I kind of want mo--"

A bubbling sound interrupted her, the whole family staring at the place it had come from: Lily's chest. The sound repeated, reminding Jamie of air rising through water, only deeper, muffled somehow.

"Oh... Kay? I feel... really weird..." Lily groaned, pressing her left hand between her modest breasts. Where her knuckles touched, the red fabric began turning darker. "Kinda... soft? Squishy...?"

"What... what's going on?" Emily piped up from where she was nestled between her wife's tits. "Is she... infected, like me?"

"It's not a sickness!" Anne said forcefully, whipping her head around to stare at the other woman, her expression instantly softening when Emily shrunk away from her, only to be held back by Anne's embrace. "I mean, like, we might all be changing, but we're still a family and stuff. We'll get through this together."

While Anne kept reassuring the horse girl, Jamie could only stare at her sister. Lily had taken her hand away from her chest, gooey strands of honey yellow fluid glistening between her fingers as she splayed and closed her fingers.

"Wow, that's so weird..." As Lily talked, the goo seemed to cover more of her hand, the honey color spreading. No, that wasn't it, Jamie realized. Lily's skin was literally changing color, slowly becoming translucent. "It tingles! Kinda cold, too..."

Before their eyes, Lily's hand turned from tanned skin to a rich yellow, the opacity quickly decreasing as Lily raised it up to her face and looked at Jamie - right through her own palm, her features slightly distorted.

"Woah! That is so cool!" Lily grinned, closing one eye and covering the other with her transparent palm. "I can still see you!"

Jamie, jaw hanging open, could only stare at her sister. This was way stranger than any of the other changes she'd encountered. Or rather, caused. There weren't even any bones left, or at least visible! Or muscles! How was Lily moving her hand?! Worry replacing her arousal, Jamie's cock was deflating slowly.

"Huh, I should be worried, right? That isn't normal..." Lily's expression shifted from giddy to slightly apprehensive, only to immediately return to giddy. "Screw that, I'm feeling way to good! Like back when I took too much Adderall and--"

"Lily Miranda Miller!" Anne's shout made the other three women jump. "You're doing ****? I thought I rai-- like, raised you better than that and stuff!"

"Relax, Mom, that stuff is harmless. I just needed to focus for college. I mean, it's not like I'm hoo--oops..."

As Lily pulled her hand away from her face, thin strands of goop connected her face with her palm and fingers. A perfect impression of her hand remained around her eye - honey yellow and slowly spreading. The imprint quickly lost its shape, consuming even Lily's eye, an amber orb now gazing at her family. Anne was still grumbling about her cute girl taking ****, but Lily ignored her, leaving her mother to pout as she put her chin on Emily's head, giving Lily the side-eye, pretending to not be interested in her changing body.

"Ooh, trippy. Like I'm wearing yellow shades!" Lily's smile didn't falter in the least, even growing wider when the change reached her mouth, quickly overtaking her lips. "Hey, it tastes sweet! Not honey sweet, but..."

Trailing off, Lily licked her lips, her tongue a darker shade of yellow and just as translucent as the rest of her. While she tried to place the taste, Jamie's eyes wandered back to her sister's hand and widened at what they saw. Whereas before, only Lily's hand had been yellow and see-through, now it had spread almost to her elbow; and at the short sleeve of her shirt, Jamie saw that her sister's upper arm had already changed, yellow slowly creeping downwards. In fact, Lily's whole shirt was soaked, clinging to her body - which was very likely just as translucent as her arm was becoming. Despite Lily being her step-sister, Jamie felt her member stiffen again at the way the fabric covered the blonde, leaving little to the imagination. The changing girl's pert breasts looked like they were covered in yellowish shrink wrap, their nipples stiff and poking through the fabric, Lily obviously not having bothered with a bra. Apparently, whatever was happening to her was also immensely pleasurable. That, or the fact she was slowly turning into goo was making Lily feel rather cold.

"Mnnffh, it's starting to feel... kinda good..." Okay, definitely arousal then. Lily's translucent left crept down to her hot-pants and began rubbing her crotch, smearing the fabric with yellow goo. Her right, still a healthy, tanned color, began pulling and pinching one of her nipples.

"Aww, my little girl is getting all hot and, like, bothered!" Anne gushed, Lily's '**** problem' apparently already forgotten. Turning to smile down at Emily and then look at Jamie, Anne continued excitedly: "And she's becoming so pretty!"

Jamie only nodded numbly, cock throbbing as Lily began mewling and gasping softly, the blonde herself once again ignoring her step-mother, but this time due to her mounting arousal. Lily's head was now completely yellow, her hair replaced by strands of slime that seemed to mirror her hairdo, amber eyes and lips betraying her arousal, half-lidded - or curved into a happy smile - as they were. And after covering her right hand and lower arm with goop as she pressed them against her body, it didn't take long before the slime consumed them as well, Lily's whole upper body now composed of honey yellow, translucent slime. Not that her legs were far behind, both her thighs already yellow and slowly losing their opacity.

No longer content with rubbing herself through her pants, Lily shoved her hand inside them, gasping as she touched her presumably yellow, transparent snatch. The added pull forwards made her pants dig into her ass and hips, squishing... no, actually pulling the fabric into Lily! Jamie boggled, the changed physiology of her sister almost too much for her. But Lily clearly had no such reservations - and could feel her pants slipping inside of her. Her smile of pleasure turning into a wicked grin that revealed teeth just a little lighter than her skin, she gripped the hot-pants with her free hand and began pulling them sideways. With a sucking sound, they separated from her right hip, trailing thin strands of goo. Beginning at her left hip, they were pulled further inside of her, through whatever had replaced her pelvis, even passing through her hand still busy at her pussy, until, with a triumphant "Ha!" Lily flung the soaked garment over towards the couch.

"That was, like, super awesome!" Anne squealed, hopping up and down a little and shaking Emily who was still hugging her. "I wish I could do that!"

With a triumphant smile, Lily repeated the process with her shirt, her left never leaving her cunt. Being semi-solid had its advantages, it seemed. But while Lily had been showing off her new trick, the had completely overtaken her legs, leaving Jamie's sister completely translucent, yellow and gooey. Not that she seemed to mind, her right quickly returning to her pert breasts, massaging the slick orbs. Lily's gasping and moaning returned with a vengeance, the slime girl not caring in the slightest that her whole family was watching with rapt attention. Or that she was still standing in the cooling puddle of her mother's cum.

In fact, she seemed to have forgotten this fact entirely. Lily squatted down, apparently deeming masturbating on the floor more comfortable than doing it while standing. But when she put down her right behind her to steady herself and plopped her bubble butt into the sticky mess below her, Lily's eyes shot open and she froze, staring down at her ass. Her slowly swelling ass.

With her sister sitting in front of her with both legs spread, Jamie quickly realized why. Lily's body, making contact with the salty fluid for the first time after the change, was absorbing it impressively quickly, thin, cloudy strands of cum rising up into Lily's body and slowly dissipating, turning it a little more opaque by the minute. The puddle was visibly shrinking, and with every drop that left the floor and disappeared into Lily, the honey goo girl gained another inch of ass. And hips. And bust. Even her thighs were expanding, and the more her body swelled, the more surface made contact with the floor and absorbed jizz until Lily had cleaned up the impressive amount Emily had spilled with two of her cum shots, the goo girl's body turning more and more opaque.

The effects were astonishing. Whereas before, Lily had been a lithe, toned cardio bunny of a girl, she now sported tits that put Anne to shame, jutting out from her chest like enormous, impossibly perky honeydew melons. With an ass to match, Lily's thighs were as big as her torso, tapering down to comparatively tiny feet. Staring down at her body open-mouthed, Lily wasn't the only one to gape at her cartoonishly oversized body, but the first to regain her ability to speak.

"Oh. My. God. This is the best day ever!" Standing up, Lily's whole body jiggled and bounced, the movement exacerbated by her bouncing a little in place. Jamie's cock throbbed at the sight of the truly gargantuan assets wobbling and shaking before her eyes. "I don't know why this is happening, but I love it!"

"Like, ohmigosh, Lily!" Anne gushed, a huge smile plastered on her face. "You're totally making me jealous and stuff! How does it feel?!"

"I feel so hyped up! And horny! And... hungry?" A quizzical look snuck onto Lily's face. "Okay, I... I need more. I feel like I should feel grossed out that I just drank up that huge puddle of cum, but all I can think about is that I want more. And I know where I'll get it."

Fixing Jamie's by now drooling cock with a hungry stare, Lily began walking towards her sister, body quaking and jiggling with every step.