"First of all, I've always wanted to see you naked Jen, so I'll take a good look at you before I make any changes."
Jennifer's clothes vanished off her body from the bottom up, giving everyone full view of her toned legs, her thick thighs, her shaved pussy, and finally her perky D cup breasts, which nevertheless drooped down a bit without a bra to support them. Her sister's body might be an exaggeration of the female form now, but Jennifer had always had the body of a model. Red faced, she instinctively wanted to cover herself, but she found she couldn't put her hands in front of her body.
"Why don't you strike a sexy pose?" Kyle said, and Jennifer did, so as to avoid punishment. She swayed her hips to the side and held up her breasts. Kyle took a camera out of thin air and snapped a picture. Jen wanted to force a smile, but her face was stuck horrified and embarrassed. Aparantly Kyle didn't want her to smile on her photo.
"With that out of the way, let's ruin that sexy body of yours."
Kyle moved the mirror in front of Jen, and as soon as she could see herself she felt an ice cold sensation run across her chest. Her precious breasts detached, leaving her completely flat except for a tiny pair of nipples. The disconnected blobs of flesh splattered on the floor and boiled into nothing. She grasped her stomach as her womb felt like it was being crushed from the outside, slowly reducing itself to nothing. The external remains of her pussy shriveled up like a burning leaf, and fell to the ground in flakes. A crack sounded from her hips as her thighs were pushed together, and she felt a sharp sting as an adam's apple popped out of her neck. Skin began to form a fold and a pair of balls dropped into her newly formed scrotum one by one. A portrusion formed above her balls, granting her a fully formed dick. In the mirror stood a weak guy with long hair, a feminine face, a plump butt, and what Jennifer would describe as an extremely unimpressive dick.
"You turned me into a guy? Why?" Jennifer said, her voice still mostly the same but carrying hint of bass.
"Two reasons. One, you're so proud of being this feminine beauty queen that I really wanted to take it away from you. But I don't like masculine chicks, so I did the next best thing. I'm not gay though," Kyle said, crossing his arms, "so I don't want to see your dick."
"Okay." Said Jen, trying to avoid conflict.
Jennifer screamed as something huge immediately forced itself up her anus, and began painfully thrusting itself up and down her colon. Her new dick involuntarily became hard.
"I don't think you heard me" Kyle's angry voice bellowed over Jennifer's screams. "I don't want to see your gross dick, so why is it still polluting my view?"
"I'm sorry! I'm sorry!" Jennifer cried as she tried her best to cover her dick with her hands. The intruder disapeared, and Jen laid on the ground, clutching her dick and sobbing.
"If I ever see your dick again, you can expect more punishment."
"But to be completely fair, I do like girls, so I don't want you to cover up your pussy, Kate."
Kate immediately scrambled to pull up her skirt above her waist, revealing her vaginal lips and a neat tuft of orange hair right above it.
"And this brings me to my second reason, I'd like to play a game with you two."
"I wanted to be a good host, so while I was altering your bodies here I created a really luxurious room in this house. It has a soft bed, a tv with whatever show you'd like, and even a personal masseuse. But I got bored after I created the first room, so only one of you will get to sleep in there and the other will spend the night in my room, tied to a chair, being fucked by a giant dildo. I think your muffled screams will help me sleep."
"Since I hate Jennifer's guts, I'll default the nice room to Kate. But it also wouldn't be much of a game if the outcome is already determined, so I'll give Jen a little challenge she can complete to switch rooms. All you have to do Jen, is rape your sister."
"Jen wouldn't do that!" Shouted Kate defiantly. "Y-yeah! I love Kate, I won't hurt her like that."
"Believe what you will" said Kyle, "but just to be clear, for the rape to count you need to do two things. First, you need to come inside of Kates vagina. Not her ass, not her mouth, the only thing that counts is her pussy. Don't worry about forcing yourself onto her, Kate is so weak that a child could overpower her. Don't worry about getting hard either, I've made you easily aroused. The second thing you need to do is to make Kate orgasm. Since your dick is barely thicker than the average crayon, you'll likely have to do that seperately. Oh, and since I don't want to see your dick, you'll have to fuck her where I can't see you. I'll know when it happens anyway."
"Now go get dressed, Jen, your new room is down the hall. Me and Kate will be waiting in the dining room downstairs."