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A Lesson in Doubling

[extreme BrE]

"Let me show you how doubling works." Your math tutor explains. Helena's a sweet young woman in her mid-twenties, dressed like a teacher in her own right. Her white button-up blouse and black skirt compliments her glasses and chestnut ponytail.

"You see how there's not much here?" She asks, bizarrely referring to her paltry bust. They're barely a handful. You nod your head. "Let's say this is one. Now what's one plus one?"

You answer "Two."

"Correct!" Helena grins. You think you see something change, but don't bring it up. "Now what's two plus two?"

You answer "Four."

"Yep!" She says, and you think that, too. Helena's breasts have definitely grown, though she's probably a B-cup, at most. "Four plus four?"

"Eight."

"I think you've got the hang of it." Now Helena's breasts rival most of the girls' at school. "Next?"

"Sixteen."

You don't even need to be told you're right. The shift is so noticeable that Helena's now sporting tits the size of her head! Her shirt's starting to strain.

"Next?"

"Thirty-two."

Half a dozen buttons rocket off of Helena's blouse. The glorious creamy skin of her cleavage is exposed, but her breasts are still covered like she's wearing a giant bra. However, you can see bits of her pink areolae peeking out.

"Next?" She can't be serious, but you answer anyways.

"Sixty-four."

The reward is great as a few more buttons are broken off from the sudden growth. Helena's rounded beauties are now out in the open, each one resting above her hips. You don't even ask for permission as your hands desperately grope you tutor's stupendous tits. Helena doesn't seem to mind, though.

"Next?" She asks between giggles.

You have to think about this one, but the answer does come to you.

"128."

The growth spurt that kicks in forces you to use both of your arms to hold just one of Helena's chest cushions.

"Next?"

"256."

Helena's right hooter falls from your grasp as it and its twin reaches her knees.

"Next?" Helena asks. She has some trouble standing up straight, but it doesn't seem to bother her.

"512."

She grows once again until all you can see of Helena is her head and neck above a pair of ludicrous, floor-touching breasts.

"Next?" Sweet baby Jesus, how big can this woman get??

"1,024?"

Yep, you got it right. This time, the surge of growth is so fast that it pushes you on the floor and covers your body. You can't take it anymore. You whip out your cock, and you start tit-fucking Helena's monstrous mammaries. The warm flesh feels so amazing against your turgid member that you can't help but ejaculate in what seems like mere moments. Your jizz is lost in Helena's Grand Canyon, yet you somehow hear her ask you a question.

"Next?"

You yell out your answer: "2,048!!"

Helena's breasts proceed to just keep expanding. You can't see anything other than her tits, but you get the idea that her tits are outgrowing your living room, then your house, and then your cul-de-sac. You imagine her feminine mountains toppling the tallest buildings in your town before they go on to smother the surrounding cities. A third of your country was covered in tits before the most disappointing thing imaginable happens:

You wake up, and come to realize that there is no Helena.

Description
A Lesson in Doubling

[extreme BrE]

"Let me show you how doubling works." Your math tutor explains. Helena's a sweet young woman in her mid-twenties, dressed like a teacher in her own right. Her white button-up blouse and black skirt compliments her glasses and chestnut ponytail.

"You see how there's not much here?" She asks, bizarrely referring to her paltry bust. They're barely a handful. You nod your head. "Let's say this is one. Now what's one plus one?"

You answer "Two."

"Correct!" Helena grins. You think you see something change, but don't bring it up. "Now what's two plus two?"

You answer "Four."

"Yep!" She says, and you think that, too. Helena's breasts have definitely grown, though she's probably a B-cup, at most. "Four plus four?"

"Eight."

"I think you've got the hang of it." Now Helena's breasts rival most of the girls' at school. "Next?"

"Sixteen."

You don't even need to be told you're right. The shift is so noticeable that Helena's now sporting tits the size of her head! Her shirt's starting to strain.

"Next?"

"Thirty-two."

Half a dozen buttons rocket off of Helena's blouse. The glorious creamy skin of her cleavage is exposed, but her breasts are still covered like she's wearing a giant bra. However, you can see bits of her pink areolae peeking out.

"Next?" She can't be serious, but you answer anyways.

"Sixty-four."

The reward is great as a few more buttons are broken off from the sudden growth. Helena's rounded beauties are now out in the open, each one resting above her hips. You don't even ask for permission as your hands desperately grope you tutor's stupendous tits. Helena doesn't seem to mind, though.

"Next?" She asks between giggles.

You have to think about this one, but the answer does come to you.

"128."

The growth spurt that kicks in forces you to use both of your arms to hold just one of Helena's chest cushions.

"Next?"

"256."

Helena's right hooter falls from your grasp as it and its twin reaches her knees.

"Next?" Helena asks. She has some trouble standing up straight, but it doesn't seem to bother her.

"512."

She grows once again until all you can see of Helena is her head and neck above a pair of ludicrous, floor-touching breasts.

"Next?" Sweet baby Jesus, how big can this woman get??

"1,024?"

Yep, you got it right. This time, the surge of growth is so fast that it pushes you on the floor and covers your body. You can't take it anymore. You whip out your cock, and you start tit-fucking Helena's monstrous mammaries. The warm flesh feels so amazing against your turgid member that you can't help but ejaculate in what seems like mere moments. Your jizz is lost in Helena's Grand Canyon, yet you somehow hear her ask you a question.

"Next?"

You yell out your answer: "2,048!!"

Helena's breasts proceed to just keep expanding. You can't see anything other than her tits, but you get the idea that her tits are outgrowing your living room, then your house, and then your cul-de-sac. You imagine her feminine mountains toppling the tallest buildings in your town before they go on to smother the surrounding cities. A third of your country was covered in tits before the most disappointing thing imaginable happens:

You wake up, and come to realize that there is no Helena.