starting to get hard just from looking at her. I didn't realize that she knew what was happening until she said 'I guess you like what you see, huh?', amusement and excitement clear in her voice. All I could do was answer honestly, saying 'Oh, yeah -' I like what I see a lot!' With the spell broken, I didn't hesitate to lift my head a little farther, and extend my tongue so that I could slowly draw it across her opening, getting a fresh sample of her nectar. In return, Sis lowered her head and captured the head of my semi-erect cock between her lips before sucking as much of it as she could into her mouth, and starting to massage it with her tongue.
With the understanding that it was going to take longer before I could climax again, Sis took that as an excuse to take it slow and easy with what she was doing to stimulate me. In return, I did much the same -' taking a few moments every so often to rest and just look at her, and how the various parts of her sex had changed in response to what I'd been doing.
Only later did I find out from her that those relatively brief pauses in my oral attentions had stimulated her nearly as much as anything else I'd done: knowing that it was me, and that I was really looking at her, had had no small effect on Sis' libido. For her part, there wasn't a whole lot for Sis to get interested in -' the change between a flaccid and erect penis just isn't all that involved. So she made up for that shortcoming by trying to find out just what kinds of things she could do with it: how much she could stuff into her mouth, how far into her mouth/throat, how far her tongue would go around it, testing how hard it was at different points with her lips, examining every square millimeter with the tip of her tongue, and so on. Needless to say, between what the two of us were doing to each other, and the views I was getting of her, I found myself recovering a lot faster and farther than I had any reason to expect. There wasn't anything that could be called a definite transition point from when we moved from simple investigation to stimulation of each other; it was a much, much more gradual process. Without either of us having to say a word, we agreed that we would each take our time with the other, enjoying and prolonging both what we were doing, and what was being done to us. I knew that I was having a positive effect on her, but it still surprised me when Sis had what I figured was a small orgasm while I was trying to see if I could lick her tonsils from the 'wrong' end. Several minutes later, she had another -' stronger -' climax as I was applying a soft, rhythmic suction to her clitoris. Both times, when she'd gotten her breath back, her efforts on my erect penis made me feel like I was getting even harder and longer -' something I hadn't thought possible. But it was while I was doing something relatively innocent that I got a reaction from her that I really didn't expect. Along with trying to learn what I could do with my lips and tongue and mouth, I was also using my hands on any part of Sis that I could reach: breasts, sides, back, and (of course) her cute little butt. I'd been caressing and squeezing her firm round buns when I accidentally (really!) let one of my fingertips brush across her anus -' causing her to suddenly pause what she was doing as she made a soft grunting noise. At first, I thought I'd upset her; but when she didn't say anything, it finally occurred to me that she might actually have liked it. Still, it took me a bit to work up the nerve to do it again on purpose. The second time, I couldn't doubt that what I was doing pleased her: I could see as the lips of her vagina got a trifle longer and darker, and the area between them wetter. That was all it took to convince me to see just how much attention she'd let me pay to her nether region – As it turned out, she seemed agreeable to pretty much everything I did.
Starting from simply running my finger across it, all the way up to wetting my finger with my saliva and gently working it into her slightly, any attention I paid to her there only seemed to be met with her approval, and increase her arousal -' and her efforts on me. Things came to a head, so to speak, when I was worming my finger around as far inside her as I could get it while fluttering my tongue across her clitoris: suddenly freezing in place, Sis let my erect cock slip from her mouth before she released an incredibly deep -' yet somehow passionate -' groan as her body began almost convulsing as she orgasmed over me. While her vagina was pushing out wave after wave of her delicious oils, her sphincter was clenching around my finger so hard I was almost afraid she'd somehow pinch it off; even as I was eagerly lapping up the abundant overflow of her nectar, I could only be amazed at the effect I'd obviously had on her. Despite everything, though, there was only so long she could climax like that. She finally all but collapsed on top of me, gasping for breath and shuddering when aftershocks of her experience coursed through her body. I managed to rescue my finger from the clenches of her anus, even though doing so resulted in another groan of pleasure from her as I pulled it free. After giving the cleft of her sex a final swipe with my tongue to remove the latest wave of her essence, I laid back, content to let her get herself under control again before finding out whether she needed -' or even wanted! -' for us to continue. Her head was resting on my leg, and each time she exhaled, I could feel her breath on my cock; that was enough to compensate for the lack of more direct stimulation, and keep me almost completely hard. I'll admit to feeling relieved when I finally felt her begin to stir on me (I was starting to worry that I'd somehow 'broken' her); so I was completely unprepared for the way Sis suddenly moved to not only take me into her mouth again, but how far: she took nearly three quarters of my erect penis between her lips almost immediately. Then she started trying to see how much more she could take. Her initial efforts delighted me. But when she kept going – I could tell that it wasn't easy for her -' that she was struggling with trying not to gag as I felt the head of my ever-hardening penis reach her throat; but the sensation was simply too damn incredible for me to object. All I could do was trust that she wouldn't do anything to hurt herself, or that she didn't want to do.
Even so, I could only lay there in awe as I felt her lips getting closer and closer to where my penis and body met. I was amazed when I finally felt her lips firmly wrapped around the base of my cock -' and then overwhelmed by the feeling as she starting trying to swallow, the muscles of her throat massaging the head of my penis in a way that I'd never even conceived could be done. Despite having to pull back every so often so she could take a couple of breaths, Sis kept at it; it wasn't but a few cycles of her efforts before I felt myself getting ready to blow my load.
Somehow, I managed to get control of myself long enough to let her know; the nodding of her head as she acknowledged what I said was enough to push me over the edge. To this day, I'm still surprised that she was able to keep as much of me in her mouth as she was -' the way it felt to ME, I'd have thought that just the force of the first wad of my cum erupting from my dick would have pushed her head off of me, never mind having it spraying directly into her throat. But Sis didn't waver in the slightest: she eagerly (even greedily) swallowed what felt to me like a quart of semen, and kept going -' guaranteeing that the next eruption was damn near as strong as the first, as were all the ones that followed. When she finally pulled her mouth off of me, I felt as though I was just short of having been turned completely inside-out; I could only lay there panting as she eagerly used her tongue to make sure that none of my semen remained behind.
After sitting up, Sis pivoted on her tailbone and moved to lie next to me.
Draping a leg and arm across my body, she kissed my cheek and hugged me before resting her head on my shoulder. She seemed perfectly content to just lay there like that until I finally (!) got my breath back and was able to tell her 'Damn, Sis!' I swear I could feel her smiling as she said 'After the way you made me feel, I wanted to find out if I could do that same thing for you. I guess it worked, huh?' It took me a few more seconds before I was able to say 'What I did made you feel like that?' I heard a soft giggle before she answered 'Oh, yeah! I mean, I was kind of surprised the first time you touched me there, but it still felt good, and kind of sexy. Then you did it again and again, and it kept feeling better and better. When you finally started putting your finger inside me – that was just great! Then after you started moving it around and using your tongue on me that way -' well, you know what happened then. That's not anything I'd like to do too much, 'cause it hit me so hard -' but sometimes, sure.'
Still catching my breath, I managed to tell her 'If me doing that makes you want to do what you did, then I wouldn't want it to happen too much, either. I don't know if I could stand it!' She giggled again before replying 'Yeah, I could tell it did a lot for you. I thought you were going to drown me!', teasing me. I couldn't help laughing briefly as I hugged her in response. After that, the two of us were perfectly content to just lie there, enjoying the touch of each others bodies as we recovered from the experience.
Sis and I weren't after each other all the time, but rarely did we fail to get each other off a couple of times during the course of a week, either. Looking back at it, we shouldn't have been surprised that we were eventually found out -' but we damn sure were when it happened – Mom and Dad had gone out for some reason or other, with the expectation that they wouldn't be back for a few hours. At first, Sis and I had simply kept at whatever we'd been doing: homework, household chores, and so on. But somewhere along the line, we'd had to start doing something together.
Again, we started out normally enough, but being brother and sister, we couldn't help start messing with each other: I'd get in Sis' way, then she'd get in mine; she'd do something to make me have to re-do something, then I'd
