Jon considered carefully. He really didn't want to have to spend his week as his mother's identical twin, but he also couldn't risk losing the stone, and he could tell his mother was adamant about her decision.
Jon sighed in defeat. "Ok. I'll do it."
His mother smiled ear to ear.
"Oh, thank you Jon! I've always wanted a sister! I just know we'll have the best time!" She gushed.
She paused after grabbing the stone. "Maybe this isn't the best place to do this." She said, gesturing at the bathroom. "Let's go to my room." Jon reluctantly followed.
After closing the door and making sure the curtains draped the window, Sherry (Jon's mother) turned to him.
"Are you ready?"
"As ready as I'm gonna be." He responded unenthusiastically.
"I wish that for the next week Jon would be perfectly identical to me."
There was the familiar flash, and then a massive tingling sensation that was almost too much for Jon to stand. It felt like his entire body was asleep instead of just a foot. Is this what it was like for Karyn? He wondered.
Still smiling, Sherry led him to her vanity mirror. He could see that his hair, already the same color as his mother's, was now shoulder length and curled in a feminine style, the exact same style and length as his mother's.
As he watched, his skin lightened to match her tone, his body hair falling out even as extra fat built up under his skin giving him a soft, smooth appearance. He could feel his pants and shirt tightening slightly as his hips and chest bulged disturbingly, giving him a womanly figure, while his clothes loosened in still other places, muscle dissolving in his shoulders, torso, and legs.
Already he had changed enough that no one would ever see him as anything but a woman, but the changes continued still. His legs gaining a feminine shape as his body shrank until he was his mother's height of 5'5.
"You're turning out to be a beautiful girl, Jon." His mother commented before the tingling intensified one last time, this time centered around his face. His jaw receded and his cheekbones rose. His nose narrowed and shrank, and his eyebrows thinned, giving his face a significantly more female, and rather pretty, look.
"Almost there." His mother assured him.
Suddenly he began to age visibly, his hair thinning slightly as his face gained some small wrinkles. He even felt his new breasts sag a bit. While still attractive, he was most definitely a woman in her early fourties.
As the changes faded at last, Jon found two moms staring at him in the mirror, one in delight and one in shock. But the one on his left's smile faded slightly.
"Hmmm. It's still not quite right." Sherry said. "Oh, I know!"
Jon groaned as his mother started going through her wardrobe and underwear drawer.
"Mom, don't!" He exclaimed, still somehow surprised to hear his mother's voice say the words and feel hair tickling his neck as he turned.
"Now, now. This is part of being your mother. You promised me!" She reminded him.
"Ok..."
His mother turned back to him, carrying a bra, panties, khaki pants, black shoes with a small heel, and a light pink v-neck shirt that was similar to the green one she was wearing. Jon had no choice but to stand still as she undressed him ("It's nothing I haven't seen before!" She assured him) and dressed him in her clothes.
Jon still felt incredibly awkward as Sherry stepped back to admire her handiwork. The clothes were tighter and softer than he was used to, he could barely balance in her heels, and he couldn't get over how weird it was to have so much of his shoulders exposed in a shirt.
"Now remember," His mother told him. "Do your best to have fun, but this is also a learning experience. You know not many boys get to learn what makes their mothers tick!"
Her expression suddenly became less serious, and the mischievious grin was back on her face. She held her hand out to him.
"Hello Sherry! I'm Sherry Parker. Who might you be?"
Jon gulped, but reminded himself it was only a week, and tried his best to sound like his mother.
"Hello Sherry! I'm Sherry Parker too!"
His mother giggled as the two identical middle aged women shook hands in greeting.
