Truth be told, Robin didn't know what made the rock glow. She didn't know if it was radioactive or if it was some sort of outer space magic. To her, it hardly mattered. She just liked the way it looked, the pale green light making her smile, and the fact that it seemed to be smoldering despite being cool to the touch was just another neat thing about it. Scientific inquiry and academic endeavor were the last thing on her mind. It made for heck of a nightlight, too; it put out a lot more light than those little plastic stars that had adorned the ceiling of her childhood bedroom. The glowing rock earned itself a perch on her bedside table, often the last thing she looked at before she went to bed and the first thing she looked at in the morning, still faintly glowing despite the light streaming in through her windows.
As far as Robin was concerned, there was absolutely no relationship between constantly bathing in the glow of the rock and the new tightness of just about everything in her wardrobe. She quietly cursed her dryer as she adjusted her bra, as she tugged the hem of her shirt over her tummy, as rubbed the lines left in her ass by her panties. Of course, she didn't put her shoes in the dryer, so it didn't explain why they seemed tighter, too, and it certainly didn't explain how it was suddenly just a bit easier to reach things on the high shelves in her kitchen. She felt a bit like she was going crazy, like she was losing her perception of reality. The rock, with its comforting glow, kept Robin grounded, even as she struggled to button her jeans and put the new bra she had just ordered into the return packaging. They had "mislabeled the bra," obviously.
Denial kept an iron grip on Robin for weeks and it took hitting her forehead on the door frame to her bedroom was enough to finally knock some sense into her. All at once, she realized just how much she had grown. Her tits were now these massive things that hung from her chest, each one rapidly encroaching on doubling the size of her head. She rubbed her hips, finally appreciating just how big they had become, realizing that it wasn't that the chair in the waiting room had been poorly made; it just wasn't made for someone as wide as her! Her cold feet at night weren't simply from the inadequacy of her blankets but from the fact that they hung a good foot or two past the edge of her bed! She had never been particularly slender, and 5'4 was a perfectly respectable height for a woman in her family, but all of that had been left behind. She now towered at a neck-straining 8'9 and her curves, even proportionally, were gigantic. Every heavy, thundering footstep send ripples through her softest parts, her ass swallowing any panties she dared to put on and the sheer enormity of her tits putting the engineering of her bras to the test.
So she knew that she had grown and seemed to still be growing. Another day or two passed before she realized why. She held the little rock, still glowing as always, in her hand. With how much bigger she had gotten, rock seemed smaller than ever as she examined it, turning it over in her massive hand. A thought struck her. The rock, somehow, was doing this to her, but really her only exposure to it was at night, when she slept. If she had grown so much just from getting a six-hour dose every night, what would happen if... Robin bit her lip, the corners lifting into a smile. Slowly, she pushed the rock between her breasts. Pleasure surged inside her. Her eyes fluttered and a moan slipped out, barely muffled as her teeth sunk deeper into her lip. The rock fit perfectly between them, surrounded by soft, wobbling tit. Her cleavage swallowed it completely. Much to her pleasure, there was no hint of the rock buried inside. While she couldn't see the glow that had given her so much, she could certainly feel it, a familiar, dull pressure building all over her body. Only a few months had passed since she had found the rock and brought it home; what would another few months bring? How big would she be in a year? Her massive, thick thighs squeezed together at the thought, her arousal building. She didn't know.
But she couldn't wait to find out.
