Boobs!

You select her breasts, since they're not that big. A setting appears, asking if future transformations should be recognized by the subject or if they should be oblivious. You select oblivious so as not to stir trouble right away. Another option appears onscreen that reads, grow or shrink? You are about to press the grow button, obviously, but a crashing pot from the kitchen startles you so bad that you drop the phone onto the ground.

You pick it up quickly, and to your horror, you see that it selected the shrink option. You look at Sophia across the room and see that her shirt is flattening, until there's nearly nothing left.

A new measurement pops up, displaying Sophia's new breast size, and your jaw drops as it's a Low-A now. To your relief, a new notification appears, displaying that, due to the shrinkage, the mass that was lost from Sophia's tits can be relocated elsewhere, either into another girl or into another one of Sophia's attributes.

You quickly navigate through the options, deciding to redistribute the mass into Sophia's butt instead. As you hit confirm, Sophia's lower half begins to fill out in all the right places, leaving her looking even more stunning than before. The fabric of her jeans is clearly straining against the new change, but she doesn't even acknowledge the transformation due to the attribute of your transformation ability.

Her updated size pops up, with her hips at 42 inches and her thighs at 28 inches.

You smile to yourself as you realize you're making her body into an unreal bottom-heavy build, so you just decide it's probably for the best if you continue down that trend in any other transformations.

Soon after, your mother calls that dinner is finished, and you all finish eating. In between conversations and bites, you steal glances at Sophia, whose face seems a little flushed and her breathing slightly quickened, probably due to her body's arousal from expanding her hips and thighs. You can't help but feel a sense of satisfaction at the effect your changes are having on her. As dinner wraps up, you start to wonder what other transformations you could explore with Sophia in the future.

As you all finish eating, you head upstairs, finish some schoolwork, and fall asleep.

—

You wake up in the middle of the night to a strange sound coming from the room next to yours. Your sister Sophia's room. It's her voice. She's moaning. You snap out of your sleepy stupor and check the time. It's currently 2:48 in the morning, and you realize this means that your app's features have been reset since it's a new day.

Slowly and quietly, you make your way to the open doorway of Sophia's room. You peek inside, and she is indeed playing with herself. Since you completed the quest of using the transformation ability, you're blessed with a grand total of 105 tokens.

You quickly purchase the Max Snaps upgrade for 50 and also the Add Condition upgrade for 25. You now have 4 snaps per day instead of 2. You open the Condition Addition menu, and it is just an input where you can add a low-level condition to any part of someone's body. Reading the description, a low-level condition is just a condition that can't have more than one cause and/or effect on a single body part.

After a little bit of consideration, you add a condition to Sophia's ass. Smirking at your own invention, the condition reads: "Sophia's ass is nearly as sensitive as her nipples when touched by other objects and gets more sensitive as it gets larger."

The new condition flashes into small particles and goes to highlight Sophia's hips on the app's rendition of her body.

You look up from your phone to see Sophia hitting her climax, moaning in absolute ecstasy as her fingers move faster and faster. You can't help but feel a sense of satisfaction at the success of your customization, knowing what can possibly be in store for Sophia in the future. Eventually, her body shivers and falls limp as she rolls over, probably getting to sleep right away.

You decide to just head back to your room and indulge in some self-pleasure of your own after seeing such a glorious scene.

—

Morning arrives, and you continue your usual routine until breakfast, with Emma and Sophia already eating at the table like usual. Emma is dressed in a simple white blouse and jeans, her dark hair cascading down her shoulders in loose waves. You decide to add Emma to your woman library on the measurement app, so you get a quick snap of her.

After breakfast, your mother sends you and Sophia off and waves, saying, "Have fun at school! I have to work extra tonight, so I won't be home until late."

You both nod, and you reply, "Sounds good. Should I ask Emma to make something, or should I just cook myself?"

Your mom just nods, giving you the go-ahead to ask Emma to make something for dinner. You and Sophia head off to school, already looking forward to what the evening has in store.

You notice as Emma sits down that her expression tightens and her face reddens slightly, signifying the newfound sensitivity of her posterior.

She doesn't let her slight arousal show, but she definitely feels it.

—

During your first class of the day, you decide to test the abilities of your measurement app even more. You want to see Professor Kay's body expand over the course of the school year. As you watch her lecture, you can't help but feel a stirring in your pants. You've always had a thing for Professor Kay and often imagined what it would be like to be alone with her. The thought of her body growing larger only adds to your excitement, making it difficult to focus on the lesson at hand.

You glance around the room, making sure no one is watching you. You select Professor Kay in the measurement app, selecting her ass to transform. You successfully selected "grow" this time, unlike your last mistake. Finally, you watch as her hips widen and her skirt tightens around her waist. You can see the curve of her ass becoming more pronounced, and you feel a sense of satisfaction wash over you.

The seams of her skirt are getting much tighter, and you can see the fabric straining to contain her new shape. Her 38-inch hips are now at least 42 inches, and her 24-inch thighs have grown to 26 inches.

Professor Kay continues to lecture, seemingly unaware of the transformation that has taken place. Her voice drones on, but you're not listening. You're too busy staring at her body, eyes fixed on the way her skirt is stretched to the limit.

Suddenly, you hear a faint ripping sound. Glancing down, you see that the seam of her skirt has given way, a small tear appearing at the side of the professor's hip. You quickly cease the transformations, not wanting to draw attention to Professor Kay's altered body. The rip is small, but it's noticeable, and you see a hint of her white underwear peeking through.

You feel a pang of excitement, heart racing at the sight of Professor Kay's exposed skin. You can't help but imagine what it would be like to see more of her body, to transform her further, and to make her even more voluptuous.

Professor Kay continues to lecture, seemingly unaware of the tear in her skirt. You watch as she gestures with her hands, her DD breasts jiggling slightly with each movement. As the class progresses, you find it increasingly difficult to focus on the lecture, your mind consumed with thoughts of Professor Kay's body. The temptation to reach out and touch her, to explore every curve and contour, becomes almost overwhelming.

Class ends shortly after, and luckily for you, Mya Lee is in the next class too. You can't help but stare at her as she walks in, her hips swaying seductively. Feeling your dick stirring in your pants, your mind fills with dirty thoughts. Before going into your second class of the day, you decide to check the app to see Professor Kay's new sizes.

Kay Smith

• Height: 5'7"
• Breasts: Mid-DD cup
• Waist: 30 inches
• Hips: 38 —> 42 inches
• Thighs: 24 —> 26 inches