"So I've been thinking...."
It was amazing the sheer range of emotions simple words like those could evoke in me when they came from Kristin. Predominantly concern that she had yet another scheme to get us into trouble, but also a curiosity as to what it would be. It wasn't like all her ideas turned out badly after all. Case in point, our current relationship had come about largely do to her having the nerve to initiate things I never would have. If she hadn't started anything we never would have ended up having sex on a regular basis and, even though a lot of people would never understand, I wouldn't reverse the clock on that for anything. Kristin was simultaneously the best thing in my life, and the most dangerous.
I turned to my sister who was sitting cross-legged and completely naked beside me after another of what were becoming regular midnight encounters. Being sneaky was unfortunately just a necessary part of our relationship.
"Okay, I'll bite," I said. "What have you been thinking?"
"You know how we're going to be finishing high-school soon?" she asked.
"We still have a couple months to go, it's not that soon."
"Right, but after that we won't be going back ever."
I was getting a little confused at Kristin's seeming concern for leaving school behind. If anything I would have expected her to be getting excited.
"You're right, we won't be going back. Assuming you show up to your exams," I said.
"Hey, I've been doing better recently," she said with a pout. "I've been going to all my classes and everything. I'm not going to get stuck there without you, that would just suck."
Admittedly Kristin had been putting more effort in once I pointed out that if she had to repeat a grade I wouldn't be there with her, and neither would any of her friends. If she thought school was Hell now, going back another year would be even worse.
"Alright, I'm sorry," I said. "What were you going to say?"
"Well, I want to do something a little crazy, something that I wanted to do for a while but never had the chance."
"And that is?"
"Have sex in a classroom. During school hours, not like breaking in at night or anything."
"In a classroom," I repeated slowly.
I briefly considered that Kristin might be joking, but I didn't think she was. And really, it wasn't like it would be the first time she'd been interested in doing something risky. The thing was I didn't really know if I liked the idea.
"We'd have to be careful about how we do it of course," she continued, as though reading my mind. "I know we can't actually let anyone catch us. I've been working on a plan, I just need to sort out a few details."
Some of my concern dissipated as I realized Kristin wasn't talking about just finding an empty classroom and hoping for the best. I was going to need more convincing than that however.
"So, what's this plan then?" I asked.
"So far what I'm thinking is getting a teacher to hand over their class when they have a free period," she said. "If we lock the door and close the curtains and everything we should be perfectly safe for the better part of an hour."
"Yeah, should be. What happens if this teacher decides to come back early, or someone else with keys decides they want in for whatever reason? And how are we going to convince a teacher to let us have the room to start with?"
"Well we're going to need a lookout, I already thought of that. And I think it's probably going to have to be Shannon since she already pretty much knows what we've been up to."
"That... sort of makes sense I guess," I said. "You think she'd do it?"
It wasn't just a matter of whether Shannon would take the risk of getting caught with us, or the skipping class that this plan was probably going to require. There was also the issue of how she was going to feel about basically helping Kristin and me have sex. She'd certainly been supportive of our choice, or at least she hadn't had any obvious problems with it, but up until now we'd been pretty discreet about it around her. This would be practically shoving it in her face.
"Not right away, but with a little persuasion I think she would," Kristin said. "I know it might be kind of awkward in some ways, especially since you two almost... well, there was almost a thing between you."
"Do you think it bothers her that I chose you?" I asked.
Shannon had encouraged the choice, but I still sometimes worried that she wasn't quite as happy with it as she let on. Kristin probably had a better idea of that than I did.
"Maybe a little, but she never said anything," Kristin said, biting her lip in thought. "I don't think it's that big a deal."
"I hope you're right," I said.
Kristin traced a finger idly across my chest in the brief silence that followed, drawing invisible pictures on my skin.
"Just think what it would be like though," she said eventually. "Right on the teacher's desk if we wanted, in the middle of the day. It'd be awesome."
"Or it could all end in tears," I countered.
"You're such a pessimist. You should focus on the upside, like getting to have sex with your sexy, amazing sister."
"Well I can't say I don't enjoy that," I said.
I grabbed Kristin's wrist and pulled her on top of me, loving the feeling of her bare skin against mine. She giggled and kissed me before raising herself to her knees and straddling my waist.
"I'll probably be really horny if we do this you know," she said. "You'll definitely have a good time."
"Again, assuming that we can get access to a classroom," I pointed out.
"As a last resort I've got a favour I can call in, if it comes down to that," she said with a shrug.
I struggled for a moment with what she could possibly be referring to before giving up.
"Do I even want to know what that means?" I asked.
"It's not a big deal, I just kept a secret for someone and if I need to I can remind them of it. It's a little tacky, but it might be worth it."
With Kristin on top of me and grinding ever so slightly I almost let it go at that. We really needed both clothes and at least four feet of separation for me to conduct a proper interrogation, my thoughts kept getting interrupted by how much I'd rather be fucking her again.
