With that, I was off to the races, so to speak: in addition to running my tongue across the entrance to her vagina, I expanded my efforts to include her clitoris -' and was rewarded with another exclamation of pleasure from her. I had made only a few passes across her clitoris with the tip of my tongue when I suddenly felt something incredibly warm and wet surround the head of my penis. The sensation was damn near enough to cause me to climax right then and there; it was only the wonder of what the hell was happening to me that prevented it. When I pulled my head back and looked down, I saw that the end of my erect cock disappeared into my sisters mouth. And as I watched, her lips slid even farther down until she'd taken nearly half my length. It took only the tiniest fraction of a second for me to realize that Sis had decided that if my using my mouth directly on her felt so good, she was going to give me the same kind of pleasure. Right on the heels of that understanding, it occurred to me that the more I used my mouth on her, the more she was likely to use hers on me. At that, I turned back to what I'd been doing with no small degree of anticipation. Sis had liked it when all I did was run the tip of my tongue across her clit; what else could I do that she might like? Over the next few minutes, I learned a lot about 'eating pussy' (which I belatedly realized that what I was doing was called). I tried a number of different things, and how Sis responded to them told me whether or not she liked them, without her having to say a single word. Just pressing my tongue against her opening was pretty much a no-go; stiffening my tongue and using it the way I'd like to use my cock in her was a definite winner. So was circling her clit with the tip of my tongue, and sucking on her clitoris the way she was starting to suck on my penis. Even as I was experimenting with how I could please her, Sis was doing the same thing to me: trying different combinations of tongue and lips and suction to stimulate ME. But the thing that finally ended our pleasure was when I softly fluttered the tip of my tongue across her fully-exposed clitoris -' I was amazed at how quickly she reached her climax, and how powerful it was. Even as the thigh that had been waving in the air slammed into the side of my head, she let my erection slip from her mouth as her body froze. A moment later, I could feel her going through a series of obviously powerful contractions as I heard her cries of pleasure through the muffles of her thighs. With each spasm of her body, a small wave of her juices would be pushed out of her vagina, ready for me to lick up and further stimulate her. I was both amazed and inordinately pleased at the effect I'd been able to have on her by doing something that seemed so simple and enjoyable to me. Even then, it occurred to me to see just how hard I could make her orgasm by teasing her and prolonging the process – My mind was still busy with all the things that I thought I'd like to try when I realized that Sis' orgasm was over. That she had recovered was signaled by the fact that she quickly wrapped her lips around my erect penis again, and apparently got serious about making me cum as hard as she had. And it worked -' quite well, thank you very much. Between using the tip of her tongue against the underside of the head, sliding my cock in and out of her mouth, and the suction she was applying, it took only a minute or so before she had me climaxing so hard I thought I was going to turn inside-out through my penis. And each jet of my semen was greeted with a moan of pleasure from her before she eagerly swallowed it. It was only when she felt me finally begin to soften that she let me slip from her mouth, only to lick up any wayward drops of my cum that she had missed.
Satisfied with her handiwork, she gave the head of my cock a brief kiss before sitting up and pivoting around so that we were facing the same way again. I was still more than a little stunned at how hard I'd climaxed, so Sis was left to scoot herself down so that she could lie next to me and put her head on my shoulder. I managed to find the energy to put my arm around her, and give her a kiss on the top of her head; she wriggled next to me and put her hand on my chest before saying 'Oh, Danny! That was so good, what you were doing, and how hard it made me cum! What ever got into you that made you even think about doing something like that?!' It took me a second to get my voice back enough to answer 'Honest, Sis, I don't know what got into me. I mean, while I was touching and looking at you, I could smell you, too – and the next thing I knew, I was doing that. You know I like the way you taste, so the only thing I can think is that I just wanted to taste it sooner, is all.' 'Well, whatever made you do it, I'm glad! It was wonderful! I was really surprised at first, but it felt so good that I decided to see if me doing something like that could make you feel the same way. I could tell that you were trying to find out what felt good for me, so I was trying to do the same for you, too.' She tilted her head back to look up at me, grinning, and added 'I guess I did okay, too, huh?' I kissed her forehead before answering 'Oh, you did way better than just 'okay', I promise! I don't think the first time I had a climax was that hard!' 'I guess! You were squirting so hard, I wondered if I was even going to get to taste it first. And there was so much of it, too!' With that, she let her head lower again before she told me 'Danny, I'm glad we've got each other. Not just for sex stuff, but the rest of the time, too. I always knew that if none of my girl friends could play, I could always come to you and we'd find something to do together.' She laughed, and added 'Sometimes it was stuff that got us into trouble, but even then, we did it together -' even the getting punished for it.' 'And I'm glad about us, too, Sis.
Like you said, not just for this part of it, the touching and everything, but the rest of the time.' It was my turn to laugh before I told her 'Heck, I still remember in fourth grade when Peggy McCormick kept teasing me and teasing me. I knew I wasn't supposed to do anything to her, and she was making me kind of crazy -' at least until you saw what was happening, and told her if she didn't quit, you were going to make her stop.' I could feel her blush faintly before Sis answered 'Well, you're my brother, and I didn't want anybody giving you a hard time except me!' That made both of us laugh for a few moments before settling down again. I don't know how long we laid there like that; it was probably something between a few minutes and maybe half an hour. What I do know is what brought an end to it: Sis reaching down to take my penis in her hand before hesitantly asking me 'Danny, would you – do you think you'd like to, uh, do it again? Can you?' Gee, there's a question -' would I like to bury my head between my sisters thighs again, and let her use her mouth on me? Hmmmmmmm – I gave her quick hug and kissed the top of her head again before I told her 'Yeah, I'd like to do that again. And yes, I can -' but it'll take longer before I can climax, though.' She looked up at me again, and I could see the smile on her face as she told me 'Oh, well, I guess that's okay!' In response, I asked 'How about if we take it easier this time, and kind of learn about each other more?' Her smile only got wider before she answered 'I'd like that, too.' I told you that Sis was the smarter of the two of us, right?
So you won't be surprised that it was her that made the connection and said 'Danny, I just thought of something.' 'What's that?' 'You know that 'sixty-nine' we hear about?' 'Yeah -' 'I think I know what it is, now.'
'What's that?' 'What we did. You know, using our mouths on each other.
Think about it; I mean, imagine the numbers in your head, and see if you don't think we looked kind of like that.' I did, and immediately saw what she meant; all I could do was utter a soft 'Damn.' Then she told me 'And I think I know how both of us could be more comfortable, too. You remember the sign for Cancer in the astrology reading in the paper? It looks like a 69, too -' only on it's side.' I thought about what she said, and asked 'You mean one of us on top of the other? How would that be more comfortable? You're my sister and everything, but you're still too heavy for me to be comfortable with you laying on me!' That comment earned me a poke in the side before she told me 'No, not right on you, just over you.
One of us could be on their knees and elbows, like, so that they weren't squashing the one on the bottom, but we could still get to each other.'
With the explanation, I could easily visualize what she meant, and I answered 'Okay, yeah, that makes sense. Uh, who's on top and who's on the bottom?' That seemed to throw her for a couple of seconds before she told me 'How about if I'm on top, first? I have to be able to move my head more, if I'm going to use my mouth on you, and that wouldn't be as easy if I was on the bottom.' It made perfect sense to me, and I said so. That pretty much settled things, and Sis sat up so that she could move over me.
It took us only a few moments to realize that we were too close to the head of the bed; seconds later, I'd scooted down enough that she could carefully kneel over my head. A little minor adjustment was needed before she leaned forward far enough to support herself on her elbows, her head almost perfectly positioned above my stiffening penis. From my perspective, it seemed like she was a trifle 'low' on me: I was a good couple of inches taller than her, and with her head over my penis, her crotch was roughly over my throat instead of my mouth. But once I lifted my head, I discovered that getting to her fun parts wasn't going to be a problem. The way she was positioned over me, with her knees on either side of my head, I had what amounted to a perfect view of her womanhood. Straight on, I could see how her inner lips gradually emerged from the bottom of her opening to frame the entrance to her vagina, then continue onward where they merged above the hood of her clitoris -' which was also easily visible, and starting to pull back to expose her sensitive nubbin. Even as I was looking at her, I could see her thin labia start to darken, and get ever so slightly thicker with her increasing arousal. Between them, the entrance to her vagina began to open; and it wasn't long before I could see the ring of her hymen, glistening as the juices began to flow out of her. The sight of her was both mesmerizing, and incredibly erotic, and I felt myself
