Billy waited nervously in the glow of the streetlight. Today was the night of his 11th birthday, and he was too young to be out so late, but he snuck out anyway.
For the past year he had been having an internet relationship with a woman called Circe. He knew she was a woman because they had video-conferenced - a woman of about 40 but gorgerous, with curly short red hair and Italian skin and green eyes. She would talk to him like an adult, even have cybersex with him. He had learned all about what a woman looked like and what she wanted a boy to do to her. Now he was going to meet her in Real Life for the first time.
A red car drove up, and a woman in a trenchcoat got out - Circe.
"Billy?" she said exciedly. "Hi, sweetie!"
Billy gulped. "Uh, hi ..."
She gave him a warm smile. "Nervous, love? Don't be. After all -" she opened her coat, revealing the green satin-and lace bra and panties, fishnet stockings, and green garter belt which, with her green high-heel shoes, were her only clothes. "- we're the best of friends. Right, babe?"
Billy's cock got hard and he nodded.
She jerked her head to the car. "Get in, babe. You're in for the wildest night of your life."
Billy got in and they drove away, with Circe squeezing his thighs and crotch with her free hand while Billy played with her body at will, becoming more and more excited as he touched a woman's body for the first time.
At a stop light, Circe pulled a large gold ring with a two-colored opal on it off of her finger and, with a grin, popped it in her mouth. She tok Billy's hand and kissed it, thern sucked his fingers into her mouth. Her tongue swirled around his finger and popped tthe ring on it, then she let the finger out with a loud slurp.
This was so eotic Billy had to open his pants and let his young cock loose. As he fondled it, Circe suddenly gripped it. "No-no, sweetie. Don't cum yet. I have to give you every cum you'll have tonight. And I will, too."
They arrived at a motel just outside of town and Circe led Billy to her room. Once inside, Billy received the first french kiss of his young life.
"You came here a horny boy," she breathed into his ear, "But you'll leave something entirely different."
Billy was shoved onto the bed and his pants pulled off, then Circe dropped her coat and whipped off her panties. Straddling the boy, she began to kiss and lick his neck and face, grinding her body into his. Reaching between them, she guided his 11-year-old cock into her 40-year-old pussy, which was still tight enough to make the boy moan. She groaned and began to hump him like an animal. "Cum, baby," she whispered. "Cum in me. Now, baby. Shoot it in me."
Billy grunted and squeezed his eyes shut as he shot his load into his lover's body. His entire body felt like it was being twisted, which seemed to make him hornier. Then he realized that he could't feel his cock in her pussy any more.
Billy looked down at the place where their bodies met ... and saw that where had been a 11-year-old boy's cock was now the hairless pussy of an 11-year-old girl. And that the throbbing horniness was worse than ever.
Circe slid down Billy-girl's body and buried her mouth in the new-formed pussy. Billy-girl gasped as the experienced tongue probed hose girl parts that hadn't even existed a moment before. Billy-girl's fear and shock were overwhelmed by the feelings. Right now he/she didn't care what had happened, he/she didn't want the incredible feelings to end. A new orgasm, completely different from the ones he had as a male, washed over him/her,
As Billy-girl's body shuddered in ecstasy, Circe sat up and pulled off her bra, her breasts fading into her chest, even as a cock pushed out from her crotch. Where a beautiful MILF had sat licking cunt was now a athletic mature man with pussy juice on his face.
Billy-girl had no chance to feel more shock as Circe-man's manhood penetrated his/her pussy. Circe-man took Billy-girl's legs in hand and shoved them up to Billy-girl's shoulders, letting his cock hit his/her deepest parts. Billy-girl cried out as the rigid dick hit his/her G-Spot, blinding him/her with sensation.
Billy-girl was mindless with ecstasy, orgasmic feelings washing away fear or shock or wonder. He/she was just mindless fuck-flesh, his/her universe nothing but the feeling of a cock giving cum after cum after cum.
The warm gush of Circe-man's sperm went unnoticed by Billy-girl, although the removal of that wonderful coc was noticed. Billy-girl cried out ... and felt his body twist again. He was male once more, gasping for breath, with a sperm-and-pussy-juice-coated hard-on.
Circe-man turned his shapely ass to Billy. "mount me, stud," he said in a deep, still-feminine voice. "Fuck my ass, like you always wanted."
Billy was still in a fuck-haze, unable to determine anything about himself or to think a clear thought. Struggleing to his knees, he got on top of Circe-man and shoved his slick cock into the older man's back passage, making moaning noises as he began to fuck. He gripped the man's slim hips as he pounded her asshole like he was possessed, finally climaxing inside him. With a squeak, he slid down onto the bed and fell asleep.
* * * *
The rest of the evening was spent with Circe, learning about the Ring of Changing. Now Billy - like Circe - had the power to change from male to female at will. While wearing the Ring - or touching someone wearing the ring - either could change a person from one gender to the other with a touch. Of course, the change - either way - made the subject horny as hell.
Another person could be given the power of Changing with the ritual they had just performed - giving the Ring, and giving the wearer orgasms; first in the receiver's natural form and the giver's changed form, then both in their changed forms, then in the receiver's changed form and the giver's natural form, then both in their original forms.
Circe had been given the Ring by his first lover when he was a boy of ten, and had waited until he found a sweet boy he really wanted. He had fallen in love with Billy, and had decided to give him the Gift of Changing.
They spent all night, making love in their various forms.