I felt a hand down my knickers as I leaned to pick up my bag.
I also felt a butt and clothes on my penis's hand.
I shot back up and spun around. "Julie, cut it out already," I hissed.
"Ugh."
She walked out of the room in a huff. Fuck, I still wasn't used to the umbilical cable unrolling. I followed her as she left, and went to the lunch room.
"Hey Jenny, what's up?" A familiar voice said.
"Oh, hey Kris!" I said. "Julie's been a pain all morning, but I'm okay."
"Siblings, huh?" Kris said, winking. "They're always a pain."
We got into the lunch line together as Julie finished getting her food and sat down with her friends. The umbilical cable was now wrapped around two of the support pillars.
Kris glanced at me, and then followed my eyes. "It's always a wonder that nobody trips on it,"
I looked at Kris skeptically, and ordered a slice of pizza. I hurried off to retract the cable and get a seat down the table from Julie. Kris walked up across from me a moment later.
"Are you okay, Jenny? Is Julie bothering you?" She asked, as she set her food down. "I can go deal with her, if you like."
I glanced towards Julie. The table was filling up, and I couldn't see her very easily anymore. "Yeah, I guess so," I said.
Kris smiled. "Watch my food, kay?"
I nodded, and then looked off into space, pondering the situation I'd found myself in. Kyle had used some sort of magic to turn me and my sister into a wacky sexual fantasy. I was more or less used to the immediate feeling already - which I supposed made sense, as I didn't constantly get off from wearing knickers and jeans.
Suddenly, I felt a hand rubbing my dick. I gasped, as it sped up. I tried to get up, only to fall over as I tripped over the umbilical cable. From my position on the floor, though, I could see Julie getting a back rub from Kris. That wasn't what I'd meant! I moaned in pleasure as Julie arched her back and leaned against Kris to shimmy her pants and panties off.
Kris turned Julie around and began kissing her. Julie was on her knees, with her back arched, on the table bench, with her butt pointed in towards the people on the other side of the table. I couldn't believe my sister was being so sexual in public.
As Kris kissed and rubbed my penis, I could feel it coming. They stopped kissing, and Kris turned around and pulled her pants down. Julie continued kissing Kris's pussy, and it got nearer, and finally I came, hard. Thick white fluid shot out of Julie's mouth in copious amounts, covering Kris and the people in front of her - including me, on the floor. It also dripped out of Julie's pussy, and onto her legs. I just kept spurting thick goop everywhere. Everyone else ignored it and just kept eating, even as their faces and food and bodies were covered with it.