"No way in hell," Caleb said resolutely from beside Courtney. His eyes were set on the board, his mouth in a frown.
"Aw, come one," said Jenna congenially from the couch, "maybe you could get an 'undo' space or something!" Caleb flicked his eyes to Jenna, only to be distracted by the enormous bulge in her athletic shorts, stretching the fabric over her crotch as she sat cross-legged, grinning.
"Fine," said Sara, "I'll get it over with." She leaned forward and punched the bubble with her index finger. Caleb's teenage instincts dictated that he used the opportunity of Sara's leaning forward to peer down her shirt, which fell obligingly away and offered him a view of her breasts, secured by a pink push-up bra. Where before he would have felt a swooping and a tightness in his crotch, the swooping was now accompanied by a tingling and a feeling of moisture. He only had a split second to wonder at this before the bubble displayed the number "4" and Sara sighed. "Making slow progress..." she said, sliding her token up four spaces and landing on a pink square. Pink letters read out:
Bathrooms out of order in the caboose.
Take precautions until you reach the next car.
"I don't like the sound of that," said Courtney from the floor, her brow furrowed. Sara looked from the words to her diminished friend, observing the loose bra straps which hung around her shoulders and the baggy shorts, which still offered a glimpse up the sagging legs at her smooth thighs and baggy underwear.
"What do you think it means?" asked Sara, then gave a start. "Whoa... what..." she looked confused, and a hand shot to the back of her yoga pants. She stood up and craned her neck around, looking at her rear end. She pulled the waist of her yoga pants down slightly, to see what was happening. Her friends watched in amazement as her black lacy thong began to lighten, turning to dark grey. The triangle of fabric in the center of the thong began spreading outward, causing her to jump again and plunge a hand down her pants, pulling the fabric from between her cheeks to alleviate the sudden wedgie. The fabric color lightened to a faint shade of grey as it crawled outward, forming a pair of string bikini briefs. Panty lines were visible beneath the tight garment. "This feels so weird," she commented, rolling down the waistband of her pants to observe better.
The fabric in the front and back kept expanding, until the string bikini-style panties had become a regular bikini. Their color lightened again to white. Sara had come over that evening wearing a black lacy thong, and now stood in white cotton briefs.
"Looks like something Court should be wearing," snickered Jenna from the couch. Courtney blushed. They did look more appropriate for a middle schooler - a girl whose mother still bought her underwear for her.
But the change wasn't over yet. Sara gave another start and ran a hand over her backside. "What now?" she said concernedly. Everyone in the room could see what Sara could feel. The fabric of her panties was thickening, adding girth to her rear end and crotch, stretching the yoga pants even more. Soon her panties felt downright bulky, gaining weight and mass. As she ran a hand over her puffy crotch, everyone heard the distinct crinkle of...
"A diaper!" cried out Courtney, eyebrows shooting upward. Sure enough, the white fabric of Sara's panties had changed into a crinkly plastic diaper. Her already curvaceous ass now strained her yoga pants to the max. Her crotch bulged outward, rivaling Jenna's new package. Sara ran her hands over the new diaper, blushing.
"This sucks!" she said, trying to hike up her yoga pants to cover the top of the diaper, which was spilling out. She managed to stretch the material over the undergarment, but looked positively ridiculous. She sat down on the couch, causing a symphony of crinkles, and tried to adjust her sitting posture. "As if my ass wasn't big enough already," she remarked.
Jenna and Courtney were both stifling giggles. Sara was known around the locker room for always wearing provocative underwear - thongs, satin string bikinis, sheer briefs. Now she sat, arms crossed, wearing an enormous puffy diaper.
"Yeah yeah yeah," she said. "Hey, Caleb - it's your turn now buddy."