Chapter 1

My sister Kim and I are what I guess some people call Irish twins. We're only ten months apart in age, presumably because our Mom thought she couldn't get pregnant while she was nursing me. But, low and behold, Mom was pregnant with Kim while I was just a month or so old.

We grew up very close to each other emotionally, psychologically, physically and in any other way you can imagine. As far back as we can remember, we have been best friends and confidants. Our closeness probably developed from our solitude. Both our parents have worked fulltime since we can remember. The only consistency we have had has been each other. Our family home growing up was a large Cape-style home with the master bedroom suite downstairs. Upstairs were our two bedrooms and the bathroom we shared. It is in that bathroom that what some people might call the inappropriate portion of our relationship began.

As soon as we were old enough to handle ourselves safely, Mom stopped sitting by the tub as we bathed. Since we were only four or five at the time, we were already in the habit of bathing together. This habit, however, continued. And at first, it was all innocent. It was much easier for us to each wash the other's back and since Mom was no longer helping, it made sense to each of us. However, washing our back eventually spread into washing each other all over. We did get all the usual talks about "inappropriate touching", etc.; but as we look back on the beginning neither of us thought that the talks included each other. At the end of each day, Mom would send us upstairs to bathe and get ready for bed.

By the time I was nine-and-a-half or almost ten, my little boy-sized cock started to get hard while I washed Kim's body. She especially enjoyed washing me in my aroused state. Soon after she turned eleven, Kim began menstruating and grew a thin coating of blonde pubic hair between her legs (before me, which disturbed me). We talked openly about all of these transitions between ourselves and felt no shame about any of it.

My first ejaculation took both of us quite by surprise. Kim was washing me as usual and my cock was as hard as ever. She started to move on to wash my legs, but I felt the urgent need for her to continue. I told her this and asked if she would. Since she truly enjoyed this part of our bath, she joyfully complied. Less than thirty seconds later, my cock began to jerk in her hand as it often did, but this time it also erupted with my first cum. The tip of my cock was above the water and since Kim was sitting closely between my legs already, most of my cum ended up on her stomach and arm.

We were very confused about what had happened, but both agreed that we liked it very much. As boys often do, I went to my friends for an explanation. Fortunately, I knew enough not to say it was Kim that had been playing with my cock when it happened. My best friend Jimmy had already had the experience while playing with himself and told me what his older brother had explained to him. That night, I explained it all to Kim.

"You mean the boy puts it inside a girl?" she responded quizzically.

"Yeah, and if he's old enough to spurt that white stuff then she can get pregnant when he's inside of her."

"But your thing's a lot bigger than your finger and when your finger is inside me I feel like I'm so full that nothing bigger would fit!"

"All I know is what he told me. He said his brother had some magazines that showed pictures of it. He's gonna bring me one tomorrow."

"Real pictures?" she asked.

"Yeah, I'll see if he'll let me have it and then we can look at it together."

"Okay, cool."

Sure enough, Jimmy snuck one of his brother's magazines into school the next day. Since we both knew that getting caught with such a magazine in school would have meant big trouble, we didn't dare to look at it there. Jimmy wanted to come over after school to go through it with me (he knew that my parents both worked and wouldn't be home as his Mom always was). I knew, however, that it was Kim that I wanted next to me as I explored the forbidden pages. I told him that she would be home as well and we might get caught, and asked him if I could take it to examine at night with my flashlight. He agreed and I was all set.

That afternoon, I told Kim as we walked home that my book bag contained the promised magazine. By her reaction, I think she was as excited as I was to get a look at its contents. We immediately went upstairs and laid across her bed to study the magazine (for some reason, we always had our "talks" laying across her bed). I pulled the magazine out of my bag and opened it up in front of us. I think both our jaws dropped open at the same time. The page I happened to open it to clearly showed a guy laying on his back with a girl squatting on top of him. She was halfway impaled on his cock and the look on her face was somewhere in between ecstasy and excruciating pain. The size of the erect adult cock in the magazine shown entering a girl's pussy stunned us both.

"Wow, do you think I'll be that big when I grow up?" I asked.

"I don't know, but I can't believe she can fit it inside her. She doesn't look very old." I hadn't looked at her face yet, but Kim's comment caused me to look her over a little more carefully. Sure enough, she was at most fifteen or sixteen. She was wearing only a cheerleader's skirt which she held up in her hands as she hugged her stomach tight. Her breasts stood out from her chest with no sag at all and her nipples were dark and protruding.

"Yeah, you're right... I didn't notice at first."

"I'm sure. You probably weren't looking past that," she said as she put her finger on the stretched lips of the girls pussy.

"Yeah maybe so, but I don't see you ignoring this," I reached out for her hand and slid it down the shaft of the man's cock.

"It's so big," was all she said in response.

As we turned the pages we saw things that neither of us had ever heard of (oral sex, lesbian sex, group sex, etc.) We talked briefly about some of them and wondered out loud what some of it would feel like. Then we came to a series of pictures of a guy laying on his back with one girl sitting on his cock and another sitting on his face. They were facing each other and playing with each others breasts. In some of them, they would lean towards each other and kiss on the lips or kiss each others nipples.

"Ohmygod," I slowly muttered as we saw the series.

"Do you like these?" Kim asked me.

"I never knew people did that stuff, but it sure looks like a lot of fun for him and the girls sure look like they like it too."

"Would you ever really do something like that?" she asked softly.

"I'm not sure what a girl tastes like down there, but if I liked them both and they wanted to, I guess I would. Would you?"

"Well I know I'm not ready to have something like this inside me yet," she ran her finger along the man's shaft which showed in one of the pictures, "but maybe someday. She looks like that really feels good having him lick her like that," now her finger moved to one of the shots showing the man's tongue extended and partially inside the second girl.

"I mean would you ever do stuff like this with two people?" I took her finger and ran it along the man's body, up one girl's body and down the other's in one of the shots where they were kissing. "It sure looks like they like it and they're all feeling good together," I added.

"Yeah, I know. Especially her," once again she motioned to the girl sitting on the guys face. "I guess I would, like you said, if I liked them both and they wanted to."

As we continued, we also found that there were stories. We took turns reading them to each other. Laying on her back now, I noticed that Kim's nipples were clearly protruding from the slight mounds that would be her breasts some day. She didn't wear a bra yet and since it had been a warm spring day, she only had a thin tee-shirt on. I had only seen this reaction in her when we were in the tub and my finger was inside her pussy.

"Uh, Kim, can I ask you something?"

"Sure... "

"Don't get mad or anything, but I'm just curious about something."

"Okay, go ahead."

"Well, these girls all have nipples that stand out and yours are kinda standing out now like they do when we play in the tub," she immediately covered herself with her hands. "No, don't cover them, I didn't mean to embarrass you, I like them this way," I reached for her hands and slid them down until her dark nipples showed through the tee-shirt again. "What I wanted to ask is if that works kinda like my thing where it gets hard when we play? What I mean is that do they get big like that only certain times or what?"

"I can't believe I'm talking about this but yeah, they only get like this when I'm cold or when we're playing around. And, I guess since they're like this now, when we talk about this stuff. Except when they're just cold, it's always when I get that same funny feeling down here," then she moved one hand down to her shorts and ran a finger along the crotch.

"Cool, they look really neat like that. I love washing you when they're like that because I love the way they feel when I run my fingers over them. They're really fun to play with."

"Well it feels good for me too when you do that," she paused for a moment, then said, "Do you... um... wanna try it a little now?"

"Can I?"

"Yeah," then she pulled her tee-shirt up over her head.

Although I had touched her here (and elsewhere) many times, this was the first time that there was no pretense of washing. At first I just ran my hand and fingers over her nipples, then I took a hint from one of the magazine pictures and started to squeeze them a little and roll them between my finger and thumb.

"Oh god John, that feels even better than when you wash me."

With one hand continuing on her pre-teen nipples, I used the other to turn the pages of the magazine to find a picture of a guy sucking on a girl's nipples, "Do you think you would like this?" I asked.

She turned her head to see the picture and then looked at me. With a slight smile, she nodded her head, "Yeah, I think I would."

"Want me to try it?" Looking back I guess it was a pretty stupid question, but we never did anything to each other that the other didn't want. She just nodded.

I moved down and began to gently lick one nipple as I played with the other. Then I took it into my mouth and tried sucking a little like the guys in the pictures and stories did.

After a few minutes, she said, "That feels so good... do this one now," and she motioned for me to lick the other nipple.

Having lost a purpose for my hand now, I moved it down to the crotch of her shorts and rubbed her like I did every day with the soap. She opened her legs for me and moved her hips to increase the pressure on her pussy as I massaged. After less than a minute of this, she closed her legs and I thought she wanted me to stop, but to my surprise, she hooked her thumbs into her shorts and pulled them along with her panties down and off. She then spread her legs again giving me new access to her fuzz covered pussy. I continued my suckling and massaging and soon one of her hands joined mine between her legs. She pushed one of my fingers along with one of hers up inside her hole.

"God that feels so full," she panted as our two fingers penetrated her virgin lips.

I took a break from her nipples to ask, "Does it hurt? Do you want me to stop?"

"No, don't stop... it feels so good... so good," she answered softly.

"I can't believe you're stretching to fit two fingers... that's as big as my thing," as I said this, Kim took her other hand and reached for my hard cock. She slid her hand inside my shorts and began to rub me as she did in the bath so many times. Since I was wearing denim shorts it wasn't very easy for her. She started trying to fumble one handed with the button. I noticed and with each of our free hands we got the button released and the zipper down. Together we pushed them and my underwear down to my knees and then I was able to kick them off. From there we resumed our mutual masturbation with me kissing and sucking on her nipples and pumping my finger in and out of her pussy. Kim was still assisting me in assaulting her hole with one hand while the other pumped away on my hard shaft.

"Oh god John... don't stop... oh don't stop," she began mumbling and moaning, "god it feels so good... don't stop... oh... ohmygod." Then her whole body stiffened and froze. She clamped her legs together on both our hands, squeezing with all her might. I had no idea what was happening, but I recognized the facial expression from the magazine. Her pussy was moving inside, kinda vibrating on my finger and as wet as she already was down there, she got even wetter.

When she released my hand, I brought it up to my nose and smelled her for the first time. It was actually quite nice so I decided to try tasting my finger. Her juice was so sweet and delicious I licked my finger clean and then reached down and rubbed her some more and stuck my fingers back inside her to get a new coating of her juices. When I brought my hand back to my face, I noticed her smiling at me.

"What does it taste like?" she asked.

"Like this," I said as I reached for her hand and brought it to her mouth. She sniffed and tentatively stuck out her tongue, then she inserted her finger into her mouth to experience the full flavor of her sweet pussy.

"Ummm... not bad," she said.

"I think you taste great," and then sliding down the bed a little, "Can I taste it some more?" I continued sliding down until my face was level with her hips. She just looked at me with a big question mark on her face. I pulled the magazine down and found a picture of a guy between a girl's legs licking away and showed it to her.

"You really want to do that?" she asked.

"Well, I wasn't sure before, but you sure do taste good and she seems to like it plenty," I motioned towards the picture again. "And besides, I can't leave you all wet like this," and then I brought my hand to her pussy and inserted my finger in her hole.

Without responding, she lifted her right leg and placed on the other side of me leaving her pussy wide open in front of me. I continued to work with my hand and moved up slowly with my face. Then I stuck my tongue out and tentatively ran it up her slit from the bottom to the top. Kim sucked in sharply and I thought I had hurt her.

"Are you okay? Did that hurt?" I asked

"Oh yeah, I'm more than okay... that just felt really good."

I continued my licking and then decided to try to stick my tongue inside her like the guy in the picture did. I continued alternating between licking and penetrating her with my tongue and after just a couple of minutes she again went stiff and clamped done on my head with her legs. When she released her vise-grip on my head I licked her again, but she reached down and pulled on me to come back up to her.

"John, you have no idea how good that felt. I've never felt anything like that in my life. I never thought anything could feel that good." I just smiled back at her. When I reached her face-to-face, I leaned down and kissed her.

Tasting herself on me, she began to lick my cheeks and chin to gather up her own sweet nectar. I couldn't help but notice that my hard cock was bumping into her pussy. I shifted my weight momentarily so it was between us and then began to rub her slit with it. I was still between her legs and she had wrapped her legs around me leaving her pussy wide open. I know I was trying to find her hole.

"John, that feels good too, but you're not trying to put it inside me, are you?" she asked. "Didn't you say that a girl can get pregnant that way?"

"Yeah you're right... you just feel so good right now. And those pictures just had me thinking about... you know... being inside you... like that." I motioned to the magazine that had somehow fallen open back to the first picture we saw of the young girl with a hard cock stretching her pussy wide.

"I want to try that too, John, but I don't think I want any babies right now." During this whole conversation we continued to grind our hips together and as I started to get up, I realized it was too late. I grabbed my cock and squeezed to try to stop it, but it erupted and began to squirt my cum all over Kim. It wasn't very much, but it got on her stomach, hips and mostly all over her pussy.

"Oh sorry Kim, I didn't mean to do that," I said.

"That's okay... I don't mind... " she said thoughtfully. Then she did the most amazing thing. She reached down with her finger and rubbed it in the spot on her stomach where one of my spurts had landed. "It's kinda slippery. I didn't notice that in the tub because the water just washed it away." Then she brought her finger to her mouth and tasted it. After meeting with her approval she began to scoop up the rest and bring it all to her mouth, even the biggest puddle which had started running down her slit. "Mmmm... not bad mixed together."

"Oh man Kim, you look so sexy doing that." She had to run her finger along her slit from the bottom all the way up to gather the last of my cum and the tip of her finger was clearly between her pussy lips as she did this.

"Sorry I didn't save any for you, John." Then, just as I was about to offer another load for her from my still hard cock, we heard the garage door opening. We had been going at it for two hours and Mom was now home.

"Oh no!" we both blurted out together.

"Get out of here quick," she said to me. "I have to get dressed."

I grabbed my clothes and ran next door to my room. My cock quickly deflated and I was dressed and downstairs by the time Mom had her car in the garage and was coming into the kitchen. Kim followed less than a minute later. After some small talk and a quick supper we were sent upstairs for our bath. I didn't realize until we were in the tub just how scared Kim had been about being caught. She wouldn't even play with me or let me doing anything but wash her back.

At eleven years old (almost twelve for me) all of this was overwhelming. I wanted so much to try everything we saw in the magazine with Kim; but, despite being clearly aroused, I think she was more scared than anything when we were done. We talked about it a little and agreed that we were too young at this point to be doing that stuff anyway.

Our baths only continued for a short time as well. One day about a month later, we were in the bath with Kim washing my back. My little cock was, as usual, hard. Mom walked in with more towels from the laundry (which happened only infrequently). This time, however, she looked somewhat stunned and I'm not even sure if she saw my hard-on. After we got out of the tub, she called us down and explained that we were too old now to be taking baths together and that we should start washing up separately. Kim and I remained close, of course, but I missed the physical intimacy terribly. I was just beginning to learn more about girls and sex and desperately wanted the opportunity to continue playing around with my sister's developing body.

Over the course of the next year our bodies continued maturing. Kim had been in gymnastics since she was three and I was becoming quite the competitive swimmer. Kim began developing the most amazingly muscular, but curvaceous body. Her breasts, though small, stood proud on her chest and her waist began to narrow. Her legs and ass took on a beautiful and far more grown up shape. For my part, I began working out in the gym in addition to spending hours in the pool training. Needless to say, our athleticism helped sculpt our bodies in ways most desirable to the opposite sex.

About two years after our last joint bath (I was almost fourteen, Kim was just thirteen), Kim came home from gymnastics particularly sore. It had been our habit for some time to give each other back rubs and massages especially on days like this one. I immediately offered and we headed up to her room. She laid down on her bed in her leotard and I began my usual massage. On this day, it was her shoulder that she asked me to work on. Of course, I began my massage outside her outfit, but then proceeded to massage her back directly by sliding my hand under the shoulder of her leotard. In my mind, even running my hand over her back was arousing, although I'm sure she assumed it was completely innocent. Massaging this way however, caused the shoulder of the leotard as well as the shoulder strap of her bra to pull uncomfortably against her. She told me to stop for a minute and she leaned up on her elbows.