I have been reading all your posts, and I felt a little guilty that I haven't posting anything myself. All I am about to tell you is true, but some is a little unclear because I was much younger. This is the first time I have told anyone about it. Ever. So anyways...
It all started about seven years ago when I was eight and my sister was seven. Let's call her Megan. We were watching 'TGIF' in my parent's room around nine. We were lying down on a very small (only 3-4 ft wide) kid couch, just able to fit the two of us in it. So we were very squinched together, but still comfortable. My dad was out and my mom was working downstairs. I was in my tighty-whities, short mesh shorts and a t-shirt. She was wearing pj pants and a t-shirt. It was during Christmas break, so all the shows were reruns, and of course since we were little we didn't do much on the weekends, so of course all the episodes had already been viewed by us. We were starting to get bored and kinda tired.
My mind was beginning to stray from the TV all over the room. My eyes eventually reached her body. I had seen it nude many times before, because we would often take baths together. But for some reason I started to really like her body. I couldn't take my eyes off her, and it wasn't obvious I was looking at her because our heads were on each other's soldiers. I just continued to stare at her body while she was watching TV. She began to fall asleep at put her hand on my chest.
Out of nowhere I decided to show her my 'wiener' as we called it. Without her noticing, I pulled down my pants just enough to pull out my small wiener. I then said Megan look! She looked down and saw that I was touching my wiener. She asked, 'What are you doing?' I didn't know what to say back to her, because I had no idea what I was doing! I just started to touch it all over, because this was the first time I had ever touched it besides peeing and bathing, and it was like it has just appeared out of nowhere! She was watching every move I made.
Then all of a sudden, I got my first boner. And believe me, we were both pretty shocked, a little scared and VERY curious. I didn't touch it at first, but eventually got the courage to. I realized that she was still staring at it, slowly bringing her hand closer to it, but then pulling back. I asked her, 'Do you wanna touch it?' She said, 'uh...yea.' She slowly took her hand from my chest and slowly moved her hand down my body until she finally reached it. We were both playing with it together, and sometimes I would put my hand over hers, to show her were to touch. After a while, I let her play with it alone. We must have been playing with it for a very long time because the show that had started at the beginning of this story had just ended.
I heard someone coming up the steps so I quickly put my wiener away. It ended up being my mom and she was just checking to make sure everything was fine. After a few minutes of talking to her, she went back downstairs.
As soon as my mom left the room my sister put her hand under her pants and started to rub and squeeze it. I pulled it back out again and we began to do it again. My mom later came in at ten and we were very close to being caught. It was our bedtime, and we were both very tired. We each went to our separate rooms and bed.
We never spoke of this again. I don't even think she remembers it. I have a few more stories about my sister and neighbors about a year before and about my male cousin a few years later.