Whilst cases of 'rapid' or 'sudden' expansion are rare in the Bras By Design Universe, they do happen on rare occasions. Much like the slightly more common, slower, steadier, but still rather alarming over-development cases, the triggers are often very similar; usually a build up of an additive or ingredient or some such, or otherwise an additive or ingredient reacting unexpectedly with another. Regulation of food, beverage and pharmacuticals in the BrasByDesign Universe is considerably poorer than much of our own. There's a also a satisfying ban on Animal Testing, too, although many companies don't often bother testing their products on humans either.
You may be expecting the cup of bUUst Juice in Kirty's hand to be the likely culprit here - and you'd be right to suspect it - but actually, they actually brand their smoothies as a 'health tonic for the breasts' over anything else. They do offer varieties that apparently 'promote' growth of the breasts, but there is actually little evidence that they do anything at all. It's considered by many to be no more than a cheap marketing gimmick. Besides, if every customer who drank one suddenly experienced rapid, uncontrollable breast growth, I doubt it would be long before they're whole business would be shut down and sued into oblivion!
However, that doesn't mean that these delicious bUUst smoothies are in the clear. Thanks to poor regulations, they contain all sorts of interesting and unusual additives, designed to make them smell nice, taste nice, have fun colours, give them the right consistency - and it just so happens that Kirsty might be having a reaction to one of them, right now.
At first, Kirsty feels nothing more than a little tightness on her chest. Her smart blouse feels a little uncomfortable - as thought it isn't sitting properly. She rolls her shoulders a little whilst continuing to chat away to Stephanie, but there's definitely something up with her blouse, or her bra. She can feel something digging in, and she suspects that the underwire from her 34 C-cup bra has poked out. Ugh.
But she's wrong. As she subtly tries to adjust, she can feel that there is more jiggle, more boob. Looking down, she freezes as she watches the dainty buttons on her blouse begin to strain as the fabric pulls tight and gapes in between. Her friend Stephanie is still happily chatting away, and continues walking on for a few paces, unaware that Kirsty is fixed to the spot, watching her blouse grow tighter and tighter, the over-filling cups pushed against the taut, sheer fabric. Once Stephanie realises she's talking to herself, she turns around, only to quickly dodge a button flying past her at high speed. Startled, she makes her way back to her best friend, slowly taking in the scene. There's another 'ping', and then another, as one by one the blouse gives way to a blossoming cleavage.
It doesn't take long for the blouse to give up - the final button allowing the blouse to fling back, and the huge swell of breasts to dominate. The C-cup bra, however, does its very best to hold back the burgeoning tidal wave of full, fleshy boob. Hooks begin to buckle, whilst straps creak as they strain. Those modest little cups eventually become completely stretched and distorted under the pressure, but still they hold on until they are almost completely swallowed by the enveloping breasts. Nestled in the deepening chasm of cleavage, the pretty bow attached to the over-stretched gore flutters and wiggles helplessly, as Kirsty snaps fom disbelief and into pure panic.
Her breasts are still growing, possibly faster than ever. It feels like an age, but in reality, it has only been a few moments, and if she doesn't act soon, then it could be too late. But what can she do? Well, she needs to find somewhere to hide, or at least work out what to do. Already, as the stitching of her over-loaded bra begins to pop and crack, she realises the mall is slowly grinding to a halt as people stop and stare. Bystanders are getting their 'phones out, trying to record this bizarre event. She'll be made to look like a freak on social media. She didn't ask for this!
Desperately, Kirsty tried to stagger forwards, struggling to compensate for the enormous weight of her bust. The sudden, jolting movement, however, only served to push the barely-visable bra past its limits, and it exploded with surprising violence. The result saw Kirtsy's huge, unrestrained breasts respond to gravity with such obedience that they almost pulled her to the floor - Stephanie helpfully responding to catch and steady her rapidly developing friend.
After a brief moment trying to steady herself again, Kirsty, with support from Stephanie, once more attempted a dash across the large, open concourse of the mall to the restrooms, but the size and weight of still-ballooning bosoms made progress slow and lumbering. By now, quite the crowd had formed, as folks of all ages and sizes watched in stunned silence. Each step became slower and more cumbersome, as her tits grew larger still. Eventually, unable to see her feet, or much infront of her path at all, she tripped on a small shred of frabric with a little bow attached, and landed on her huge breasts. With fraught panic Kirsty struggled to get to her feet, but even with Stephanie's help it was no use - she was stuck. Helplessly, she looked around the mall at the dense crowd now watching her, many with their smartphones raised and recording.
Kirsty called out for help, but very few of her audience seemed to do anything. What could they do? Stephanie telephoned for the emergency services, whilst Kirsty's breasts continued to over-develop, steadily swelling and stretching as they began to notably dwarf her petite figure, and take up considerable space and in the capacious mall...