A true story about my sister and I when we were younger. My memory isn't what it use to be but when you remember something like it was yesterday, the memory is pretty good.

I can't remember exactly how old we were but I do know that I was old enough to feel the desire to explore and experiment. I doubt I really knew what it was I was feeling or why I was feeling it. I was growing up and there were things that caught my attention that had not caught my attention before. One of those things was the way I looked at girls.

Girls my age (and older) were transforming into something that made them impossible to ignore. They started sprouting breasts and their hips and bums became more shapely. Instead of something that I might have ran away from, I was drawn to them, although at the time, I really didn't know or understand why.

One of my sisters and I are twins, she is just one of three siblings. She was one of these girls that sprouted earlier than some and yes, I took notice.

I wasn't the only one in our family feeling those urges, she was feeling them too. I clearly remember her checking out boys when we went somewhere together, either with our parents or just the two of us. Looking back, it was obvious that the look in her eye said many things, one of which was “that boy's got a nice ass”.

It must have been around 1980 when I accidentally saw my sister nude while she was about to take a bath, that would make both of us twelve years old. Well, not totally by accident, I had been making an effort to see what I could whenever the opportunity presented itself. It just happened to be that the bathroom door wasn't quite shut. Odd for my sister because she had always shut and locked the bathroom door when doing anything. Maybe she didn't realize I was home and really, it doesn't matter because it was a bonus for me that she hadn't shut the door all the way.

As I said earlier, she had already sprouted and had a nice set of tits, a great set actually for a twelve year old girl. There was enough there to make any twelve year old boy (me) want to see more of what was under her top.

Our bathroom was designed in such a way that if the door was partially open, there was no way anyone in the bathroom could spot someone through the mirror if that someone were peaking in. If the door was partially open, the open crack made is fairly easy for whoever was peaking in to see what the person inside was doing.

No one else was home at the time so I felt safe in trying to sneak a peek at my sisters naked body. Trying to be as quiet as I could be, I stood there bring my face ever closer to the gap in the partially open door. My sister was already in the bath and if I moved my head ever so slightly, I could see most of her, at least what wasn't submerged.

There, above the water line were the two most incredible things I'd had ever seen in my life, up to that point anyway. I was looking at my sisters tits!

Now, although it had happened before, numerous times actually, and when it did, it did so mostly on it's own. (although sometimes I did fondle it) My cock twitched and moved on it's own. Before I knew what was happening, it had grown to it's full length, which wasn't all that big at twelve years of age.

It was an extremely uncomfortable experience and I had to relieve some of the pressure. So I opened my zipper, tugged my underwear to one side and pulled out my cock.

Talk about being rigid! Even the tip seemed harder than it ever had been. The natural thing to do was masturbate and that's exactly what I did, and I continued spying on my sister in her bath. I wasn't yanking it hard, more like massaging it lightly would be how I was fondling myself.

I focused on her tits because, well, that pretty much all I could see except for her face, one hand and one bent knee sticking out of the water. Her other hand was under the water and I wasn't sure what it was doing but in about a minute, I was mesmerized by what I heard. Little squeaks were coming out of my sister mouth. I wasn't sure what to make of it and then she lifted her other leg from under the water and placed it on the edge of the tub. Her one hand continued to stay under the water but her other hand started playing wit her pretty globe like tits!

Not being totally innocent, and knowing that girls had something else between their legs other than a cock, I knew she was touching her pussy. Can't really recall what the general term for a girls pussy was back then so pussy is good.

The thought never really occurred to me that girls were just like boys in that they masturbated. The sight of my sister masturbating mesmerized me and although I'm still not sure why, think I stopped masturbating because I wanted a steady view of what was happening, when I masturbated, my head shook and I couldn't keep my eye focused on the gap in the open door.

My sisters squeals became more frequent and her breathing quickened. It didn't take long before the water in the tub started splashing because of my sisters hips were moving up and down. She wasn't moving her hips violently or excessively, but steady. Her hand, which was still underwater was moving faster though and what I saw next will forever remain in my mind. The best term to describe what was happening was that she started convulsing, her squeals built up to a louder steady high pitched sound that came in waves. I knew sort of what was happening because as a boy discovering his body, I had masturbated to orgasm several times. The only difference is at that time, there was no semen, just a clear liquid during orgasm and very little of that.

My sister worked furiously at her pussy and as she climaxed, she raised her whole hip section out of the water and there it was for me to see! Her hand almost violently moving back and forth on her pussy at speeds that would make race car drivers jealous. Her hand wasn't inserted but instead, was working away at what I obviously now know was her clit.

Her convulsions finally abated and her hips once again sank to the bottom of the tub. Her one hand followed her hips and it seemed they were inseparable . Not sure how long it took before she became aware of her surroundings but her breathing took awhile to settle down to normal.

I started fondling myself again while watching my sister lay there with her eyes closed and she laid there for quite sometime actually. I doubt she would have been aware of me if I had walked in but I did not dare try.

But all good things come to an end and my sister slowly sat up, soaped herself a little and splashed off all the soap. She stood up and grabbed a towel and for the first time, I saw her perfect little round bum. As she turned around, I also saw her pussy which was more or less nestled between her legs so was hard to really see it all. But what I did see made me wank a little harder.

I thought I might be getting careless so I slowly moved away from the door and walked as fast and quietly as I could to my bedroom. There I pulled down my pants and underwear and wanked my cock till I orgasmed. (still no semen)

An added note, I did leave my door partially open and I'm not sure, but as I lay there recovering, I thought I saw a shadow.