You have become a perfect copy of Fiona, even having the same freckles on your cheeks. Fiona pokes your left breast with her finger, probably to check if it was real.
"It is really weird to see you transform into my perfect twin. You shrank so much. Did it hurt?"
"No, not at all." you say, with Fiona's high pitched voice. "I can give you the socks, if you want."
"But won't you transform back into a man if you stop wearing the socks and the shoes?"
"There is only one way to know", you say as you take off her shoes and then the magic socks.
You both wait a moment in silence but you do not seem to change back.
Fiona searches the closet and takes a pair of your dress shoes. She sits on the bed and slips the socks on her feet.
Her tiny feet enter effortlessly in the shoes. She ties the shoelaces and gets up to take a few steps with your shoes.
"It works, I can feel I'm changing." she says.
Unlike you, her changes do not go from her feet to her head but they seem to happen all over her body at the same time.
She is already one inch taller than you and getting taller every second.
Her waist widens as her hips shrink and her butt flattens.
Her face keeps changing slowly but steadily. Her nose grows a bit and she closes her eyes. When she opens them they have changed color. She is barely recognizable and looks like a female version of your old self.
Her breasts haven't changed yet but they seem quite small now on her larger frame.
Thick black hair appears all over her torso and spreads to her arms and legs.
She is so much taller than you now, she would have to stoop to kiss you.
She massages her breasts and they shrink under her masculine hands.
Fiona's chest is now completely flat and her hands reach your full breasts and hard nipples.
She lays on the bed and whispers to you "My penis, I can feel it coming."
Your dainty hand reaches toward her crotch and you probe her wet vagina with two fingers. The transformation seems to have made it extremely sensitive and she moans with pleasure. Her voice is still female but completely changed and with a lower pitch.
Inside, your exploring fingers bump into something hard. You then realize that a penis is growing inside her vagina and her hard glans is pushing your fingers outside of her. Soon it emerges from her vagina, like a fleshy pink mushroom.
You lean toward her crotch, and take her growing dick inside your mouth. Fiona is still moaning in ecstasy, with a man's voice.
You concentrate on giving him the best blowjob you can. His penis reaches its full size. The flesh under it swells and forms a ballsack. You put a dainty hand on his balls and feel them as they grow under your fingers.
When they reach their final size, Fiona's changes are over. She is a perfect copy of your old male self.
Fiona suddenly moves in the bed, putting his dick out of reach of your probing tongue. You lie down, waiting to be penetrated for the first time. He makes you lie down and gets on top of you. You can feel how much stronger than you he has become.
As he enters your tight pussy, thrusting deeper and deeper, you feel a new kind of pleasure and also a little pain.
You move your pelvis, trying to stay in rhythm with Fiona's thrusts.
Fiona groans as he is getting faster. You moan as pleasure overwhelms you.
Fiona finally climaxes and cums inside you.with powerful spasms. He stays still against your body for a moment.
"Sorry honey, I wanted to last longer, but I couldn't control it." He said, his penis still deep inside me.
"Well, that was really intense."
"Do you prefer sex as a man or as a woman?"
Before I could answer, Fiona's phone on the nightstand began ringing. He quickly slipped out of me and took it.
"It is Joan, you have to answer, and pretend to be me." Fiona said as she put the phone in my delicate hands.
"Hello Joan"
"Hi Fiona. We left our home early and there is barely any traffic. We should be at your place in five minutes."
"Oh, great", I can't wait to see you and the kids." I said, my voice slightly trembling.
When I hung up the phone, Fiona could see panic in my eyes.
"They're coming. They'll be here any minute now. We will never have enough time to change back".