"...a buttplug!" Jessica giggled as she input the changes in the Chronivac. Katherine tittered at her side, alternating between staring at the screen and looking over at Mary. Alice just sighed, knowing how far Jessica could go with these sorts of things. "Are you ready, Mary?" Jessica asked, standing over her friend. "Oh, come off it already. I just want to get something to eat." Mary looked nervous. For a joke, Jessica was really committing to it. Jessie shrugged and hit the confirmation button and watched as Mary began to change. She shrunk down immediately as her skin became a flexible black plastic. Her glasses fell away from her face as her features disappeared into the shape she was becoming. Before long, all that remained of Mary was a pile of clothing draped over her novel. "No. Fucking. Waaaaaaaaaaaaaaaaaay!" Katie shouted excitedly, digging through Mary's clothes. She threw her friend's sweatshirt, pajama bottoms, and underwear to the side. She found the buttplug almost immediately. Mary was four inches long with a one inch diameter base that tapered to a rounded point. Her vinyl black body swayed ever so slightly as Katherine held her up for all to see. "Holy fucking shit. This is her, isn't it?" She looked to Jessica for confirmation, who nodded contentedly. "Okay, okay," Alice cut in. "We've proved that the Chronivac works, now can we change Mary back and get some pizza or something?" Alice was uncomfortable with the entire process. She had nothing against the idea of transforming her friends, but she was starting to feel uncomfortable with how much the idea was arousing her. "Fuck that!" Katie shouted, who was nearly hysteric with glee. She brushed an errant blonde hair out of her eyes and returned to holding the buttplug with both hands. "We gotta do something with her. We gotta... y'know." "Put her up your ass?" Jessica suggested, rubbing her vibrator along the outside of her bikini bottom. Her skirt lay across the chair behind her. "What? Well, not me. I mean, like, y'know?" Jessica held the buttplug out to Alice. "Oh, fuck no," the younger girl responded. "Come on, Alice. Not every day you get the chance to shove Mary up your ass." "Ugh, this is insane!" Alice stood up and started to pace around the room, trying to hide her blushing cheeks. She was definitely turned on by the idea of having her friend up her asshole like that. "Geez you two are boring." Jessica was rhythmically moving the vibrator in and out of her cunt as she reclined in her chair. "Aw, come on, Jess!" Alice shouted, her face turning a deeper shade of crimson. "Don't do that while we're right here!" Jessica pulled the vibrator out of her pussy and gave it a long, slow lick. "My mom's having a good time. Don't you think that Mary should have a good time, too? Give her to me. I know what to do with her."