"It takes about thirty minutes for our bodies to transform," said Mom. "Our bodies are pretty different. I think we'd better strip before we start."
Andrew gulped. It was true that their bodies were quite different. His mom had a nice figure for her age, but she definitely looked like a middle-aged mother of four, with C-cup breasts, a slightly pudgy belly that she usually kept restrained with body shapers, wide hips, and a broad, round backside. His clothes would get too tight in some places if he wore them through the switch. Same with hers. But he didn't relish looking at her naked quite yet. He said so.
"Silly!" his mom said. "We'll soon be wearing each other's bodies! There aren't going to be any secrets!"
"But at that point your body will technically be my body. I don't know. I guess you're right."
"Not at all! If it makes you more comfortable, why don't we slip into some loose clothing? I mean, you could put on one of my stretchy nightgowns, and I'll wear your gym shorts and undershirt."
"Well, okay."
"Come on into the laundry room," she said. "There's a few loads waiting to be folded."
Andrew followed his mom into the laundry room, where she handed him a white pair of panties and a lavender nightgown. She turned while he quickly stripped and got them on. The panties were way too big for him, constricting his anatomy in front but hanging flimsily off his behind. The nightgown proved to be tight around his shoulders, but not too much so. It had thin shoulder straps and a high, straight neckline with a thick set of ruffles below. He turned to find his mom wearing his boxer shorts and undershirt. Both were stretched tight on her motherly body.
"Here goes nothing!" his mom said. She touched the medallion to a stocking on the dryer, then touched it to his skin. He felt a mild electric shock. At first he thought nothing was happening, but then he realized that he was getting shorter. As his height dropped, he felt his legs soften and thicken. The bones popped, angling in at his hips and out at his knees. His feet shrank and became feminine. As his hips moved outward, his bottom began swelling. It got bigger and bigger, filling out the previously loose panties with large, soft cheeks, and stretching the seat of his mom's nightgown. He realized that the straps were no longer tight around his shoulders. His arms softened and changed shape as his hands became more aged and womanly.
A pair of mounds grew on his chest, pushing ever more insistently against the resisting fabric, until he could see his big nipples pointing in different directions because of the sag of his unsupported breasts. His feet were invisible now, hidden below the curve of his bosom and the thick ruffles that accentuated its generosity. His stomach swelled, too, taking on the scar tissue of two C-sections, while his reproductive organs rearranged themselves in the strangest feeling he'd ever experienced. Golden hair streaked with a little gray cascaded down his shoulders. His face softened, his nose shrank, his eyes became large and lovely, with little crows' feet at the corners, and his lips plumped out.
At last it was over. "Oh my god," he said, and was shocked to hear his mother's voice come out of his own mouth.
His mother, mesmerized in spite of herself, shook herself, and said, "Well, Mom, now it's my turn!"