Note: This story was dynamically reformatted for online reading convenience. MARY ELLEN Part I. Children Playing House For most of my childhood, my favorite cousin was Mary Ellen, who was 3 years younger. Although her family lived 2 hours away, they visited us a few times a year and we went to their house as often. I remember watching my aunt change my cousin's diaper and asking why she looked different from me. At age 4 I simply accepted my mother's explanation that girls were different than boys. As we grew older, Mary Ellen and I became good friends, playing together in my bedroom or in hers and in her family's big back yard. They lived on a 3 acre piece of land that backed to an even larger wooded area. We often roamed the woods, finding secluded spots for "forts," or "castles" where we played for hours until her mom called us in. Sometimes when we played house, we would undress for bed, down to our underpants and snuggle up together like a mommy and daddy under an imaginary blanket. We were down to our underpants on a warm summer day when I was 9 and she was 6, when she told me about what she had seen not long ago. It seems Mary Ellen had gotten out of bed to get a drink of water when she heard a noise from her parents' room. She walked up to their open door and peeked in. By the light of the full moon she could see her mommy sitting astride her daddy as if she were riding a horse, rocking back and forth and moaning softly. Then she noticed that her mommy and daddy had no clothes on. When her mom started to turn towards the door, Mary Ellen quickly pulled her head back, scrambled to the bathroom, got her drink and went back to bed. When Mary Ellen told me that story, she asked if I knew what her mommy and daddy had been doing. I hadn't yet discovered sex and it wasn't taught in school back in the 1950s, so I told her I didn't know. She said it looked like her mommy was having fun and that she would like to try it with me. I was a little nervous about taking off all my clothes, but I wanted to see Mary Ellen nude so I agreed. She quickly pulled down her white cotton panties and stepped out of them, standing before me completely naked. She was the most beautiful thing I had ever seen. My eyes were drawn to her puffy little girl pussy with the lips clamped together forming a perfect little slit. "Well, what are you waiting for? Take off your underpanties!" Mary Ellen said impatiently. I snapped out of my trance and dropped my tighty-whities. "Now you lie on your back," she directed, pushing on my chest and aiming me at our imaginary bed. I lay down on the ground and she immediately straddled my mid-section and sat down on my groin. I felt the soft skin of her pussy lips pressing on my flaccid cock, pinning it against my abdomen. Once seated, Mary Ellen started to rock her hips forward as she had seen her mommy do. Immediately my cock began to get hard, inflating quickly under the pressure of her pussy rubbing back and forth. "Mmm, this feels nice," purred Mary Ellen after a while as my hard little cock pushed open her pussy lips like a hot dog slipping between the halves of a bun. As she increased the tempo of her rocking motion, she grabbed both of my wrists and pulled my hands to her flat little chest. "Daddy was rubbing mommy's chest when they did this, so you should rub mine." Although I didn't see anything to rub, she guided my fingers to her little immature nipples and told me to "Rub me here. It feels good." I felt little bumps under my fingers but I was more interested in what was happening to my cock. I had never had feelings like this before. I had plenty of erections and once or twice I even rubbed my cock, but certainly not with something as soft and smooth a girl's pussy lips. I didn't know what was happening but I liked it. So did Mary Ellen if the expression on her face was to be believed. By now her lips were spread completely and my little cock was gently gripped between them. I felt like I was sliding in something slippery and that made it even better. Mary Ellen rocked back and looked down at where my cock was between her pussy lips. "It's bigger than it was and it's all hard," she giggled. I raised my head to look and was amazed at the sight of our genitals rubbing together. I missed the friction, so I started moving my hips under her to get my dick moving in her pussy again. Mary Ellen smiled at me and resumed her rocking motion, "It feels real tingly down in my belly," she said as she bent over and kissed me on the lips. That was the best feeling I had ever experienced and I wondered if it could get any better. Suddenly we heard her mom's voice yelling for us to come home for dinner. She scrambled off me and we both dressed as fast as we could. I sneaked a final glance at her little pussy as she pulled up her panties, then we ran all the way back to her house. Neither of us said anything for the rest of the day about what we had done, but now and then when our eyes would meet, she would give me a little smile. (to be continued)