Tiff's finger pressed the 'BUTT' button and the girl watched as the machine hummed with energy. Katie shifted in the large glass chamber while the chamber itself began to glow with an eerie blue light. It became brighter and brighter until Tiff could not see her friend anymore among the blinding lights. She heard Katie yell out for her before the light became too intense and Tiff had to shield her eyes. Moments passed and finally the light dimmed down and the machine quieted down to a low hum. Tiff slowly removed her hand from her face and looked towards the chamber. Her friend was nowhere to be seen, and all that as inside the machine were Katie's clothes lying in a pile on something large and round. "Katie!" Tiff yelled as she ran to the strange machine. She opened the door and searched in vain for her friend. "Katie!" she yelled once more and this time she could hear a reply.
"Tiff?" came a week voice at the base of her feet.
"Katie, is that you? Are you ok, where are you?"
"I think I am still in the machine, but something is blocking my vision."
Tiff thought she heard the voice coming from the mound on the floor, and that was when she noticed that there was something flesh colored beneath the clothes. She tore them off the mass and gasped when she saw what was there. A pair of large female hips that looked like they belonged on a giant woman, sans legs or anything above it, lay there on the floor. In addition to just being hips, they also sported a huge plump butt nearly, each cheek larger than a basketball and infinitely softer. In the front of the hips there rested a huge vagina, nearly the size of Tiff's head. Tiff rubbed her thigh's together unconsciously, her groin flush with desire at the giant hips. "Katie?" Tiff said, hoping what she suspected wasn't true.
"Yeah Tiff? Why do you seem so tall?" The pussy moved in time to her friend's words. when she stopped, the pussy pulsed slightly and the soft sound of breathing could be heard.
"Uh, K-Katie, that would... that would be because you're just a butt."
"What?" the butt jiggled at her surprise.
"Yeah, you are literally just an huge ass with a pussy. I mean, you are a reaaaaally pretty butt at least." Tiff patted the jiggly butt and rubbed Katie's juicy ass.
"St-stop that Tiff!"
"Oh, sorry Katie." Tiff blushed as she removed her hands from he appealing ass.
"Thank you! Now go change me back Tiff. Please!" Tiff couldn't help but keep staring at the huge talking pussy before her. She felt a little wet thinking about her friend's predicament. She had always, in some small part at least, wanted Katie to herself and now she most certainly did. However, Katie was her friend, and despite her desire to play with the giant butt, she knew she should turn her friend back.
Tiff returned to the main console. "Hurry Tiff! I am starting to feel really weird and...hungry"
"Ok, don't you worry your big butt off Katie"
"Oh har de har har," said the jiggling ass.
Tiff looked at the control panel and looked what she had to do...