When I write that Rachel and I fucked and fucked, that is about all I can say. After the first few moments of our first time, sex was no longer mysterious, even though I had never touched a girl's body before.
My first time happened the day after our second mutual masturbation session. Rachel came into my room in the early morning, I think around 6AM, but in any case, it was long before anyone got up. I looked up when I heard her open the door, and because she was so explicit and matter-of-fact with her description the day before, I felt I was watching an old movie unfold. She was in her nightgown, the one she wore when I first got a glimpse of her. She put her finger to her lips with her left hand, and pulled the sheets over with her right hand.
When Rachel came into the bed, a twin trundle, we were tightly pressed against each other. She whispered for me to lie on my back, and then ran her hand along the inside of my thigh until she came up and cupped my balls from outside my underwear. I parted my thighs and she pressed them up against my body while she rolled her hand on them. I closed my eyes and didn't move. I felt a rush of warmth come from the edge of my hips into my penis and became erect in a moment.
Then she moved up more, ran her hand up along the shaft, and then further up to move her fingers under the elastic of my underpants. I pulled them down and kicked them off. I shuddered and moved my pelvis up and down while she held her hand on the underside, and now engulfed in this new sensation, turned toward her. She turned her body away. Her nightgown had run up and I felt myself against the crack of her buttocks. I pushed slowly and rhythmically, rubbing up and down, going more and more down with each push until my penis flipped from her rear to between her legs.
It was just as she had described. I pushed forward, and her rear shifted back, and suddenly I realized I was inside of her. It wasn't even clear to me that this happened, except that there was a feeling of warmth. I started to thrust, in and out. Rachel moved her rear back and forth and bent her body so that I could go deeper. We were quiet, with just our shallow, hard breath and the sound of our sex as I pushed through her wetness. Her body bent; only our genitals were in contact. I reached over and held one of her breasts, pulling her toward me, and thrust faster and harder.
It felt like I was floating in space, without any sense of what was happening. I went higher and higher and then I came. Still inside of her, I pushed with each spasm so that my semen drove up into her. Then it was finished. I stopped. I didn't move. I didn't know what to do. I didn't want to wake up from that moment, to face the end of the pleasure, but also to avoid the rush of guilt and shame even as I was oozing out of her, as my penis was slipping out with my cum as it went soft.
I moved away from her rear. Without a word she got up, walked over to get tissues to wipe herself off, and came back to the bed. She rubbed the tissues along the sheets to deal with the semen. She might as well have been wiping off the kitchen table. Just as she had the day before, she wiped her other hand between her legs, and put them to my face, streaking me with my cum and her juices.
"Now you've fucked. Fucked you big sister." And then pulling down her nightgown - I hardly noticed it had still been up above her hips - tip toed out of the room.
So, that was it. My first sexual experience. And my first time with Rachel. Every day for the next week and a half we did it. Every time, she rubbed the fluids of our sex onto my face.