When you started fifth grade you noticed how all the girls were starting to develop their breasts. There were bee stings underneath a lot of shirts, and some of the girls had started wearing training bras. It was an unusual time as certainly these weren't impressive breasts, but for the first time in your life you were looking at girls you had known for years but in a different way. Part of you wondered just how big some of them would get by highschool. It was like a roulette game with tits, and no one knew which girl was going to out grow them all.
Except for one; there was this new girl named Ari. Pale, redhead, with a kind of mousey look behind the cutest pair of eyeglasses. Yet no one dared call her four eyes. Everyone paid more attention to those assets of hers that stretched her shirts outward. This new girl was certainly not "starting" to develop. She must have been growing since the second grade because she was already toting around a pair of D's that made every other girl jealous. There were snarky comments made in the halls behind her back every day about how she stuffed her bras, but she often enough wore a lower cut shirt after school that seemed to disprove every envious and catty rumor.
You'd spend hours each day at school sneaking peeks at the round mounds jutting from her chest. Sometimes she'd catch you peaking and as you quickly glanced away blushing she'd already be smiling a girlish and playful grin.
In sixth grade she was already a cup size larger and with her bra pushing them up and outwards they looked quite comical, especially as she walked down the hall with her books in front of her being pushed away by her own bosom. As the days rolled on it looked more and more like her breasts were simply resting on her school books as she walked, and she'd catch you peeking down at them whenever the two of you went from class to class.
One day she came up to you, practically pushing her chest in your face and asked if you wouldn't mind carrying her books for her. She had a black jacket on, but with the way it was buttoned and the way her cleavage was heavily displayed, you had to wonder if she was wearing a bra or even a shirt. With those huge pale orbs dominating your view she claimed she had too much to carry already. With a darting glance down towards her own cleavage she simply smiled an impish grin and pressed her upper arms together until her breasts looked ready to burst free from the jacket. Your arms trembled a little as you took her books and she treated you with a huge inhale of breath and a long sigh dramatically emphasing the removal of her books as a burden, and no small amount of shifting breast flesh from the deep breathing. From that day on she always handed you her books, and she'd walk by your side with her heavy breasts bouncing in front of her. Going from class to class was a pleasant experience that broke up the monotonous school days. You'd carry her books, and she'd give you a visible treat of cleavage that she pretended you weren't looking at. The slight smirk on her girlish face proved she enjoyed providing the sensual and teasing view.
The tradition of carrying her books continued through seventh and eighth grade, as did the consistency of her breasts to keep growing without restraint. She wore button up shirts, but when she was around you she always seemed to unbutton it a little lower just to tease you into glancing down at her cleavage and pretend to not notice when you did. Every month that passed seemed to require her to purchase new shirts to contain her growing breasts. You didn't know why she grew so quickly, whether it was just hormones or something else, but they grew ever larger and the expanse of cleavage she teased you with grew greater as well.
By high-school her breasts covered her whole upper torso even when confined within her heavily custom tailored bras. Although there were many days when she wouldn't bother with the bras at all. The days when she didn't wear a bra were the most distracting. Her cleavage was no less impressive, but the bulk of her tit-flesh would wobble in the lewdest ways inside her shirts. Teachers were hard pressed to criticize her choice in wardrobe since the articles of clothing she could purchase and wear were quite limited. A chest that looked like it was smuggling soccer balls simply demanded it's own rules. She continued to hand you her books and walk by your side, with one hand clinging to your arm, and the side of her fat breast pushing against your side, bouncing up and down as the two of you walked.
During the warmest days she'd wear special strapless tops that stretched and strained across her front to cover her tits. Her breasts both seemed to hold her shirt up while at the same seeming to threaten fall out of it. Ari even seemed to pick her shirts with the intention of teasing you the most. One particular top was practically vinyl and you'd lose yourself in the hypnotic spectacle of a single drop of sweat rolling down the expanse of her mountains when the heat was high. You'd feel your own sweat breaking out on your neck as you watched her pull books from her locker. Reaching in to the locker forced her breasts to press against the sides of both adjacent lockers, and every so often her strapless shirts would ride down enough for you to spot the edges of her areola's. She'd look sideways, catch you staring in time for you to look away, and then return to rummaging in her locker, almost intentionally taking her time and pressing her breasts even more fervently against the lockers. You'd look back in time to see the top half of an areola that Ari must have known was visible from your angle alone, but still she didn't adjust her shirt until she'd wasted plenty of time in her locker to enjoy that you'd almost barely see the nipple poke over, but just before it would she'd step back, pull the shirt back up and adjust herself, and move on, grabbing your arm to take you along with her to class.
Near the end of highschool Ari seemed to have finally stopped growing. She had spent nearly a whole year with no new growth, and while the teasing and playful treatment continued, she seemed increasingly more possessive of you. It had become no secret in school that Ari fancied you, but whether you two were a couple or not seemed rather vague. For years now you'd had no interest in any other woman, but your situation with Ari had always been a playful, almost mistress and pet kind of arrangement. You knew Ari could have any boy she wanted and it seemed foolish to assert yourself for fear that rejection would mean the end of the teasing and playful enjoyment. Yet during that last year you found yourself deciding to be a tad bit more forward. From time to time you'd start copping feels of either the sides of her breasts or her ample behind. At first she seemed surprised, but with a light touch she didn't dissuade you. Over time you grew more daring, and on several occasions you found yourself pressed up against her face to face, inches away from her lips, yet caught in the stare of her beautiful eyes from behind those glasses your courage failed. You simply couldn't read her, and it drove you crazy.
One day not long after her 18th birthday she walked beside you in an empty hallway at the end of the school's hours. Most other students had rushed out to meet the spring evening, but she pulled you aside and pushed you up against the lockers. Her books fell to the floor and she filled the void left behind by them with her massive breasts, pinning you and filling your hands with her tit flesh. She was tired of playing coy, and right there she kissed you firmly, refusing to break the lock of your lips. Boldly you clenched and fondled her tits, feeling the soft flesh of her tits disappearing into her shirt. Somewhere beneath them you felt her hands searching your pants and you knew she was finished with the games.
"I have better things for you to carry", she said with a whisper and pulled you into an empty teacher's lounge. Locking the door behind yourself you turned around to see her pulling down her strapless shirt and lifting her fat naked breasts into view. "Do you love me?"
It was such a loaded question, yet it seemed like the most obvious and rhetorical one as well. For how many years had you loved her without saying it? "God yes I do."
Advancing on you she allowed restraint and propriety fall away with her clothes. She tore yours off and pulled you to the floor. "I'm sure you've noticed that I haven't grown much lately." Indeed you had, but then again she had grown enough for four woman let alone one. "But I want to bigger too..." She let the question hang in the air as she straddled your naked body and fished for your manhood between her thighs. "...and I know how to do that..." She gripped your cock and held it firmly in place for spearing her moist and hot womanhood. You could only feel it as her breasts suppressed all your vision. All you could see was an expanse of breast flesh topped by heavy rippled areolas with hard nipples. She teased your cock head by rubbing it between her lips. "...what do you says?"
Such a heavy question. Fuck the woman you've grown up wanting and turn her into a pregnant and massively busty wife for the rest of your life, or walk away. The answer seemed obvious and yet the fact she hesitated showed she honestly wanted you to make the choice, to give you the chance to define your relationship with her. She had always been the one in charge, but she couldn't go forward with this without you. She wanted more than a pet, she wanted a lover.
How could you say no? She gasped when you thrusted yourself upwards and tied your future to hers.
"Honey? Could you come here?" You had just put the little ones to bed. It was only three years later, yet Ari had already given you three beautiful babes. Making life for a family work was tough, but every day you spent with her helped you find yourself happier than the last.
Walking in to your bedroom you noticed Ari was standing up. She rarely moved around more than she had to. Her breasts had swollen and fattened up to twice the size they had been in highschool. The constant milking and nursing had effectively turned her into a human dairy, but she didn't seem to mind. With a computer she managed to find work that she could do from home, and she always had plenty of time to feed and care for the newborns. She left the more rigorous chasing of the toddlers to you.
She walked seductively towards you with her fat breasts swinging heavily from side to side and milk already dripping from thumb sized nipples. "You know what time it is lover?" She asked with smile and twinkle in her eye. You shook your head but then you realized what she meant. "It's time to work on number four." She smiled a huge grin and led you back to the bed where she treated you to a...
...Happily Ever After.