Ben and Susan’s unusual relation – part 3

This is a story about ben and susan who are siblings but….let’s continue

“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 Susan. Predominantly concerned 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 due 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. Susan 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 Susan’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 Susan 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 Susan 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 Susan 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, it 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 Sherin 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 Sherin 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 Susan 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,” Susan 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.

Sherin had encouraged the choice, but I still sometimes worried that she wasn’t quite as happy with it as she let on. Susan probably had a better idea of that than I did.

“Maybe a little, but she never said anything,” Susan said, biting her lip in thought. “I don’t think it’s that big a deal.”

“I hope you’re right,” I said.

Susan 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 Susan’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 favor 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 Susan 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.

“Hang on, who exactly are we talking about?” I said.

“Miss Reid. We had her for English last year, remember?”

“Yeah I remember.”

“Well I had to see her after class one day and she was late and her laptop was open….”

“And you snooped,” I finished.

“Yeah, I found some naughty things there. You should have seen how embarrassed she was when she came in and found me looking through it.”

“Not that you had a lot of moral high-ground, you shouldn’t go through people’s stuff like that.”

I’d had enough trouble keeping my sister out of my things, and I had more influence over her than most anyone else. An open laptop and no one around made her story more than believable.

“I know, I was kinda bad. I couldn’t help it though, it was just sitting there and I got curious. Somebody really needs to teach me to do better.”

“Mm-hm, but how could I possibly do that? I could try spanking you, but you’d probably just enjoy it.”

“Uh-uh,” she protested, though a giggling fit gave her away. “You wouldn’t do that anyway. Not to your poor, innocent sister.”

“Like hell.”

I pushed Susan off of me and rolled on top of her, pinning her arms above her head. She made no real move to resist, though she did struggle unconvincingly underneath me. Despite how recently I’d cum I was starting to get hard again from the continued presence of my naked sister, as well as her current antics. She knew exactly what she was doing and her wriggling brought her into contact with my growing erection far too much for it to be coincidence.

“Ooh, no please not again,” she said in an incredibly fake display of unwillingness. “No I promise I’ll be good, don’t put your dick in me again.”

“Cut it out or I’ll put it somewhere you actually might not like,” I growled.

“You mean my butt?” she said, dropping the act instantly. “‘Cause if you’re going to help me I’d totally let you. It could be like an early reward.”

“Seriously?”

It had been an idle threat more than anything, but I shouldn’t have been too surprised that Susan would take it as more than that.

“If you want to. I’ve never actually tried it before and it might be fun,” she said.

My cock had grown hard enough that it was poking at Susan’s pussy and when she rocked her hips it slid along the length of her wet slit. It was more than a little distracting.

“I don’t know,” I said. “If you’ve never done anal we’d probably need to take it slow and build up to it.”

“Why, you think you’d hurt me?”

“Pretty sure we don’t have any lube lying around, so yeah I think I’d probably hurt you. Even with lube I don’t know how well it’d go.”

“Hm, oh well. Maybe some other time then.”

The tip of my dick was just beginning to push its way inside Susan’s pussy, aided by her constant hip movements and careful positioning. I was tempted to give in and just fuck her like she wanted, but I had something else I wanted to try now that she had me thinking about it.

“Flip over,” I said, pulling away from Susan a little.

“‘Kay,” she said unquestioningly.

She rolled over and lifted herself onto her hands and knees, wiggling her butt at me as though assuming I wanted to fuck her from behind. She was right, but there was more to my request than that.

Without offering any explanation I ran a finger over her pussy lips, then gently pushed it inside. As I expected she was more than wet enough for my purposes and my finger came out covered in her juices. When I pressed it to her asshole she finally turned her head to try and see what I was doing.

Ben and Susan’s unusual relation – part 3 will continue in the next page.