"This isn't funny, Jen!" wailed Erika telepathically. "Turn me back! Look, I'm like, really, really sorry! I shouldn't have done that. Just, please, change me back! I don't want to be your vagina!"
Jenny stopped rubbing herself briefly and answered, angrily, "Aww, what's the matter, Erika? Don't like the thought of existence as living genitalia? Well, tough. Now you know how I felt. Better get used to it."
All Erika could do in response was to quietly whimper, "Please..."
"Sorry, Erika. You made your choice, and turned your back on me when I needed your help. I had to use up my Transform or Dare on you to make myself whole again. Now, I'm not sure, but technically, I'm using your mouth and your vocal chords, so I think I might get your turn as well. I mean, you're certainly not going to use it, in the form you're in. But even if that's the case, and even if I weren't totally pissed at you right now... I'm not going to risk wasting it on you. I have somebody else in mind. But... seeing as you are my friend, I think I have a way to get my revenge on Kyle and turn you back at the same time. Of course, this all depends on your... cooperation."
"C-cooperation?" repeated Erika uneasily. If she'd had a throat she would have gulped. "Wh-what do you want from me?"
Jenny's sadistic smile reappeared. "Well, Erika, considering that you're my pussy now, you'd better start acting like one. That means that, until I've put my plan into motion, your two main functions are to be quiet... and to let me have some fun with you."
"Fu-- AH! Unnngh!!!" Erika's moans of pleasure interrupted her logical discourse mid-sentence as Jenny began fingering her again. "Oh my God!" she cried.
"Good, huh?" smirked Jenny. "Admit it, this part is actually enjoyable."
Erika felt the blood rush to her. She wasn't sure if she was blushing or if it was just part of being aroused. Stubbornly, she conceded, "Ohhh... alright, I admit it. That was very nice."
Jenny pulled apart her lips a little with one hand and ran her other index over her clitoris. An immense wave of euphoria shivered through Erika's entire being. "How's that feel, hm?" asked Jenny.
"Ohhhhh... don't stop, Jen!" cried out Erika. "It's... wonderf-- aaaahh! Wonderful!" Erika was so consumed by the pleasure, she didn't notice that her entire thought pattern had changed. Her terror at being stuck as her friend's vagina melted away, and she began to regress into a purely sexual entity. "Yessss... more... more!" she demanded. She could feel herself dripping with moisture. "Mmmm... come on, Jen! Like, go faster! Rub Erika. Stroke Erika. Jen put fingers in Erika... Erika... need... cum!"
At that instant, Erika got what she desired so desperately. Jennifer collapsed back, trembling, as the pleasure of climax overtook her. For Erika, it was the most intense and absolute rapture she had ever experienced. It made her delirious.
Finally, panting and gasping for her breath, Jenny said, "Wow, that was really strong. I haven't felt one that strong in a while." Erika did not respond. She was almost completely spent.
Jenny wiped off the moist area between her legs where Erika had dripped and pulled up her panties and skirt. Erika protested, "Aww, you're covering me up?"
"Of course I am, Erika. I can't exactly walk around with you exposed. And, as fun as this was, we do have other more important things to do."
"Oh?" asked Erika. "Like what?"
Jenny clenched her fists. "I'm going to find that little jerk Kyle Perkins and make him really wish he'd never started this."