My first experience of female and male fun was after Steven had told me that him and his sister who was two years younger than us at the time so would...have been about thirteen at the time had started showing their bits to each other, so next time I went over to theirs, all 3 of us were in his room telling her about cocks and the different shapes and sizes there is, she didn't believe me so I told her I would show her mine if I could see her pussy, she was embarrassed so Steven told her to do. He joked about the size difference as I sat back down on the bunk. My head was now the same height as his crotch. I looked up at him."Can I touch yours," I asked.His face froze for a second then he nodded. I gingerly reached out a hand and touched his cock. It twitched as I touched it but it didn't shrink. I just brushed it against my hand."Grab it," he said suddenly. I didn't hesitate. I wrapped my hand round his hard rod and pulled at it gently. I looked up at him and he had his eyes. He tried again and it seemed to be less painful. A few more strokes and the pain seem to have ended. Then she started to moan a little and she started fucking back in time to his rhythm. They started fucking harder and harder and she moaned more and more.Finally, she starting yelling “fuck me Daddy, fuck me Daddy” and her body erupted in a cum.He loved the expression on her face as she came. He slowed his rhythm and gave her time to recover. Finally she seemed ready. “Did you have a nice cum. I could feel that she was shaking and I assured her that I wouldn't hurt her with my cock.I began to stick my cock inside her pussy and Lisa moaned, "Steve, the head of his cock is entering my pussy, it's so big baby and it feels so fucking good!"I pushed in a little further and Lisa responded, "Baby, his cock is going further in to me, do you like this Steve?" Lisa stuttered."Yes Lisa, Your pussy is his now, he's fucking you isn't he?" Steve muttered."Yes Steve, he's fucking my tight pussy, it.