This is the first in a sequence of five chapters. The overall plot of this story comes from a sequence of porn videos I found on the Web. But movie-makers often leave out substantial parts of their stories. This is what
really
happened!
We moved when my twin sister and I were just a few months over eighteen—early the summer after Jenny and I had finished our junior year in high school. Our parents had both gotten their promotions to full professor a couple of years earlier, he in philosophy and she in psychology. Thus, even in the high-priced real estate market of mid-Eighties Boulder, Colorado, they could afford a better house than the one Jenny and I had grown up in.
In our new house, Jenny's room was right next to mine. We hadn't talked to each other about it when we had the movers set up our beds; later we found that we'd put them next to each other, right up against our shared wall. That wall seemed pretty substantial, but it wasn't soundproof—not by a long shot. The first night we lived there, we'd all been tired and gone to bed early. And, shortly after we'd gone to bed, I heard her masturbating.
I don't mean that I heard the juicy sounds of her fingers sliding around in the wetness of her pussy's folds. The wall filtered those sounds out pretty well. They might've come through, for all I remember, but I didn't even realize, then, that fingers applied that way might make any sounds; so I wasn't listening for them. What I heard was the "Oooh!"s and the "Ahhh!"s, those "Mmmm!"s and "Unnh!"s, that came from her unguarded mouth.
She'd gone to bed just before I had that first night in the new house because, gentleman that I was, I'd let her have the bathroom first. I'd just gotten back from my turn in the bathroom and lain down, naked, for the night. Like most eighteen-year-old guys would do, I was asking myself whether I was going to jack off before I went to sleep. As I pondered, I gave my cock a few experimental strokes—just to see if I was in the mood.
And then, still undecided about my mood, my half-hard cock in my hand, I heard her soft moans through the wall. I'd never heard anything like that before; but I guessed, instantly, what she was up to. Thoughts of her female body lying so close to me, and of the part of that body her hand must have been on—the part of her body that made her a girl—filled my mind. So did thoughts of replacing her hand on that part of her body with the corresponding part of my body—which sprang to attention. It decided for me the question I'd been asking myself.
Her noises grew as she progressively lost control of herself. And I realized that she was muttering, incomprehensibly at first. But as she got closer and closer to her orgasm, her muttering got a bit louder. Not that she was shouting, or even using a normal tone of voice. I don't think you could have heard her from out in the hall, even from just outside her door. But I heard her distinctly through the wall: "Oh, fuck me, fuck me!" She repeated it, again and again, sometimes adding, "Fuck me harder!" And shortly after that, I heard, even a little louder, but a lot less distinctly, the incoherent noises that signalled the arrival of her orgasm.
My trial strokes became much less conjectural, and as the resulting sensations became more demanding, I realized that I was about to groan. But I knew, now, from what I had heard through the wall, that Jenny would hear me, so I managed to stifle that incipient groan. And, somehow, I contained all of the other noises—including even noises from the bed—that a guy might make while bringing himself off.
That's a difficult thing for a young man to do. But I was a very introverted—in fact, nerdy—guy, and I valued my privacy very highly. That probably explained why I didn't have much experience with girls. I was too geeky and too afraid of girls, though I'd somehow managed a few dates. But I'd been too shy to try to kiss anyone (let alone put a hand on anyone's boob), and nothing had ever developed out of those dates. But I was pretty good at keeping things private when I wanted to do so, and being able to hear Jenny's moans through the wall was something I
really
wanted to keep private.
Jenny was different. She was extroverted, outgoing. She attracted guys; and she liked their attention. She'd had a number of boyfriends since she was fourteen, enough that I'd lost count. From the way she talked to me about her boyfriends, I thought that she'd probably fucked most of them. None of those guys had lasted very long, though. She always seemed to get dissatisfied with the current guy pretty quickly. As a rule, one of her relationships lasted several weeks, and then she'd break it off and start on another one.
I knew I should have been ashamed of myself for thinking about her the way I did when I heard those noises. After all, she was my sister, and not just my sister, but my
twin
sister—my womb-mate. "Should have been," maybe—but I wasn't.
I guess we weren't as close a pair as many twins are. We'd been a lot closer when we were small, though now we had a more nearly typical brother-sister relationship. But I was secretly glad to have a sibling my own age, and I think that she felt much the same way—naturally neither of us would have admitted to those feelings. We often watched TV together—though, of course, there were the mandatory fights over what we were going to watch. We spent time together studying—not only for the things we were taking together, but for the courses we were taking separately. We got along with each other pretty well, and I thought we liked each other.
More than liked, I guess; there was genuine affection between us. We touched each other frequently. When we met or parted, it wasn't a bit unusual for either of us to give the other a quick caress or a squeeze, or even a kiss on the cheek.
Her appendix had burst, during the summer of the year before we moved, and the way I'd hung out around the hospital, night and day—in her room when the hospital staff would allow, and in a nearby waiting room when they wouldn't—was a family legend. During the fall after that, I'd sprained an ankle trying (unsuccessfully) to do an ill-advised stunt on a skate-board, and during the week or so I spent on crutches after that, she'd driven me everywhere I had to go (or wanted to). She'd even carried things for me when I couldn't handle them together with the crutches.
But, again, neither of us was about to admit to that affection. Like most siblings of about the same age, neither of us shied from taking advantage of the other whenever an occasion arose. We put each other down when possible, and we squabbled over silly things whenever something silly (like what what we were going to watch together on TV, who got the larger piece of pie, or whose turn it was to do the dishes) arose to squabble about.
And now, here I was jacking off while I listened to the sounds of her jilling off, thinking not only of what her body must be like, but what I'd like to do to it. For a few days, I did feel a bit of guilt about that—especially two days later when I heard her again and reacted the same way as I had the first time. But within a few weeks I'd settled into a routine. And as my listening became routine—along with the accompanying thoughts and actions—my guilt faded.
I figured that I'd had a bit of luck in discovering the nature of the wall before she had, so I kept myself very quiet when we were both in our rooms—not just when she might hear me whacking off. I didn't want my noises to come through our wall, because she might realize just how easily sound traveled through it. I even considered playing with myself only when she wasn't in her room. But the routine developed as quickly as it did because she masturbated three or four times a week, right after we went to bed. Naturally, the noises she made always gave me a boner—and a pressing need to do something about it. But I kept myself silent, perfectly silent, as I brought myself off.