Your sister's exploratative

“So you’ve tried it on yourself right?” Your sister said animatedly as she walked next to you, always watching the box you held away from her as she idly licked at her ice cream.

“No… why would I use it on myself?” You say, looking at the girl like she’s gone insane. “There’s like a million buttons and switches and other weird looking shit here and none of them are labeled?!”

Also it was a bit worrying that earlier when the cop had changed he-er-she seemed to not notice that she was a literally different being.

Your sister rolls her eyes at you as she does one long lick that confusingly causes your nethers to stir.

“Nuh-uh… you know that one turns you into a small succubus… thingy.” she says as she points at one button that you’re fairly sure isn’t even the one that she’d pressed earlier.

“Greeeat, yep, we’re making progress, just have to figure out what these other million weird looking things do.” you reply sarcastically.

Your sister suddenly perks up when you say that and a moment later a devilish grin spreads across her face.

“I think I have an idea of just what we need to do sis!"

Not that long after…

“Uhm… sis?” you whisper as the two of you enter through the front door of the house you’d been staying in for the past few nights.

“Hmm?” she replies as she rushes in ahead of you, clearly excited for something.

“I get the idea, it is pretty clever, but why are we doing this here of all places? There are plenty of people we don’t know down by the beach?!” you rasp between clenched teeth.

She rushes up the stairs with a small bag from the grocery store in her arms. She turns back to you with her typically devilish grin before she continues down towards the kitchen.

You sigh and hurry after, carrying your own load, that of the fairly heavy metal box.

“Girls? How was the beach?” you could hear your mother calling from the direction your sister ran.

“We didn’t go, we decided to hit the shops this time!” came your sis’ reply.

“Oh? Find anything nice?” mom said.

The warm smell of something hot and delicious grew stronger as you reached the kitchen, turning the corner, your sister now sat on the table opposite from where your mother stood making dinner. Your younger counterpart looked at you with a conspiratorial gleam before her eyes dipped back to your mom. As you sat down with the device in hand, she produced the plastic case of stickers and several markers that you’d both bought.

“My! That looks interesting!” your mom calls from across the room, eyeing the metallic object now resting on the table.

You take a moment to gauge what your sister wants to mess with.

She isn’t quite a milf, having had both you and your sis in her mid 20’s, she’s nearing fifty and while she’s got curves, they show sag from age and from the toil of caring for the pair of you all on her own. Her face hasn’t weathered as well either with crows feet edging in and the occasional wrinkle showing these recent years.

You lean towards your sister, whispering so only she could hear above the sizzle of something tantalizing on the stove.

“We don’t have to use mom for this! WHY are we using mom for this?”

Again sis rolls her eyes as she gets a white sticker ready with a pink marker.

“Cuz mom could use a bit of a makeover and WHY the fuck not.” comes her whispered reply.

You shake your head, biting your lip as the girl carefully points the right end towards your mom and flips one of the many switches. You grate your teeth as the fairly loud *POP!* meets your ears. You hesitantly look towards your mom, hoping she won't kill you if it’s something crazy.

“Wow! That’s new!” your sis says.

You stare in confusion however. As far as you can tell, your mom hasn’t changed yet. You glance back at the device on the table and, yeah, it’s pointed right at her. Could something have gone wrong this time? Nothing looks different, the same dark hair, same plump and aging physique, that same dark complexion…

“I… can’t see anything different. What happened?” you whisper in an agitated voice.

Your sister’s eyes bounce up to you, a sticker with the words “Dark Skin” on it.

“You… can’t see it? She was literally white as bleach a second ago.”

You glance back, suddenly unsure about all that you believe. Is that true? Could your mom actually be light-skinned? It did make some sense considering you were direct offspring and you didn't have quite so fine a dark coloring. But all your life you’d just accepted that well… she’s just a darker shade than you or your sister, it's just how things are…

“Maybe we both have to be touching it.” your sis proposed, grabbing your hand so that you could touch the cool metal as she moved the switch now labeled “Dark Skin'' back to its previous position.

Before your very eyes, your loving mother changed to an appearance foreign to you, fair white skin, close enough to your own, it unnerved you to see her like that.

“Alright, so I think that means the buttons are like a whole change while the switches do one thing about the person.” you could hear your sister saying. “So then what do these dial things do…”

She began to spin one of these protrusions, this time with your hand in place. The sound this time is an odd whirring that feels almost like static in the air.

“H-hey… I’m not so sure about…” you petered off as yet again your mother’s body began to change.

Humming, swaying back and forth as she works away at preparing dinner, you watch as, at first nothing seems to be happening but slowly a familiar bulge forms in her pants between her round thighs, growing thicker and longer so that only after a few seconds of this you can see your mother’s pant leg is straining to contain the immense size of her brand new dick.

“Okaaaay then… so that’s the ‘penis slider’...” your sister says, pulling out a sticker to write it down.

Your mom continued as if nothing was amiss, perhaps shuffling awkwardly at times to reposition her new endowment but otherwise just as quickly moving about preparing ingredients and cleaning her station.

“Hmm… she’s kinda hot with a cock…” your sis says, eyeing your mom up and down with her finger on the dial.

“Sis! Change it back! She doesn’t want one of those!” you rasp, glaring at her.

She does her typical eye-roll “She doesn’t even know…” she says. After a moment, however, she does dial it down… most of the way. You can still see a small bulge, but you deem it acceptable, after all its about the same as what you have between your legs.

“Alright, eenie meenie minie…”

*POP!*

Suddenly your mom’s breasts, large but fairly low on her body, both enlarged and bounced up to a more health appearance.

“Ohp!” she startled, chuckling slightly as she had to reach around the mountainous orbs to even reach the things she was preparing now.

“Hmm… so that one just like doubles breast size or something?” your sis asked you questioningly.

At first you thought that as well but as your eyes roamed those peaks you realized that there was something collecting at the tip of her fairly prominent nipples… that milk was beginning to seep through her top as she worked away.

“Makes you ‘milky’” you could hear your sis saying as she wrote the words on a sticker. You were a little too distracted with watching your mom’s breasts growing ever milkier, causing a small river to run down one large breast.

Wait… was that a “POP” just now? You glanced over at your sis but she was still writing.

Must’ve been just the sound of the food cooking.

“Alright, let's change that one back. Don’t want mom to miss uh…that.”

You agreed, it was weird to see your mom with so little cushion on her chest. Sis flipped the switch and all your mother’s buoyancy returned, fresh milk already beginning to collect through her top. It was weird to see her without her naturally dark complexion and to see the obvious bulge down below but this was something familiar, something safe.

“Oh dear.” the elder woman said as she looked down at the splotch collecting. She hefted the orb free of her shirt, displaying the milky end for just a moment before she turned it down to one of the pans where she was preparing food before she let the faucet run free.

You licked your lips, already tasting the scrumptious flavor of your mother’s milk on your metaphorical tongue.

“Why don’t you pick one this time?”

You looked at your sis again, curious at how she seemed to be staring at your mom and… blushing? She was definitely up to something, but with the power to change all about a person right here, you didn’t want to think too hard about it right now, so instead you just picked a dial to begin twisting.

The change was obvious this time. All across her mature form, her already generous curves began to grow. From her thighs to her hips, up to her already expansive mounds she began to grow in every direction. So much in fact that you had to quickly dial it back so as not to make your mom collapse under the weight of all her new mass.

“mmmf…” your sister lightly moaned across the table from you.

She seemed to notice that you noticed her outburst and, blushing, she sat up, instead reaching for another sticker so she could write “curviness” on this one.

Your mom looked so far off of what you remembered of her now. Light skinned with a fairly large cock and extra curves, just about the only part yet untouched was her face which still looked appealing if aged a bit.

“Alright, just a few more minutes and we can eat! How’s that sound girls?” the woman called out, humming as she swayed her exaggerated proportions back and forth working in the kitchen.

Artists - Mare Ten, Uno Makoto