"...my new upper body!"
Erika was dumbfounded. "What?"
"You heard me! Since you wasted my shot at turning back to normal, you've just volunteered yourself to be my new upper body! Everything below your waist is going to disappear. Your torso is going to attach to me and make a whole person. Once it does, your... our... no, my entire upper body is going to change until I look exactly as I did before I got Kyle's phone call this morning. I'm going to see with your eyes, and speak and eat with your mouth, and have full control of your mind and body, and nobody except me is even going to remember that you ever existed."
"But... like, without my body... what's going to happen to meee?" Erika gulped.
"Isn't it obvious, bitch? You're going to be my pussy! Although, no eyes or voice for you. Real pussies can't see or speak... although if you're a really lucky girl, I might give you something to play with!"
Erika begged. "Nooo! Don't do this to me! Jenny! I'm sorry!!" But it was too late. Inside Erika's underwear she could feel the changes happening already. Her vagina was sealing shut. Within moments she had a smooth area of flesh where once it had been. She tried to run out of the stall, but she didn't get far; her legs just disintegrated, sending her tumbling to the bathroom floor. She looked back down and realized her shoes, socks, skirt and panties were all piled in a heap near the stall. She was just in time to catch a glimpse of the skin that had once been her vagina and buttocks retreating into her body.
And then, suddenly, Jenny was stepping out of the stall, and Erika could feel herself being pulled toward her, almost magnetically. Tendrils of flesh erupted from Erika's bottom half, stretched across the distance, and melted into Jenny. More and more of them united them, until, like a massive elastic band, Erika was violently snapped into place atop Jenny. It was at that moment that Erika completely blacked out.
When Erika finally awakened, she could feel something touching her, over and over. Whatever it was, it felt wonderful all over. Though everything was dark, she felt as if her entire body was charged and overcome with intense pleasure. And then, she could hear a voice. It was muffled, but instantly she could tell it was familiar, and she could hear what it was saying.
"See, Erika, that's not so bad, is it?" asked Jenny.
A thought surged through Erika's consciousness. "Jenny? Where are you? Like, where am I?"
Jenny spoke again; apparently she could hear Erika's thoughts. "We're still in the bathroom at school."
"I can't see you. What's going on? Why do I... ohhh... feel so good all of a... unnngh... sudden?"
"Oh, don't worry about that," answered Jenny. Jenny sat in the bathroom stall with the door closed. She was wearing Erika's shirt and bra, and had her skirt and panties down around her feet. Gently, with a malicious grin on her face, she massaged her "friend". She was exactly the same as she was before Kyle's phone call-- well, except for the sentient vagina. "I'm back to normal again," she said, "and I just thought I'd try you out."
At that moment Erika remembered what Jenny had demanded of her. Terrified, she asked, "You don't mean...?"
"Oh yes, Erika... I'm going to have a lot of fun with you between my legs!"