I was 15, my sister 13. Our parents were away for the week & we were left at home with relatives who lived upstairs.
one night during the week while watching TV in our apartment, we started goofing around & wrestleing. The play started to involve grabing bear hugs and the accidental touching in private areas. Her boobs were just developing so I took advantage by brushing hands across her chest and eventually grabbing on for prolonged holding which she did not seem to mind. I grew bolder and put a hand down her pajama bottoms to cup her pussy over her panties & statred rubbing, she did not protest so I put my hand inside her panties to feel real flesh. Her light pubic hair felt wonderful as did her small breast held by my other hand. I inserted a finger in her and we just sort of calmed down to rest a while and savor the moment, she did not tell me to move hand but let me finger her for a while. That was all for that night.
A few nights later we took an all night bus to join our parents. During the night she curled up under a blanket turning toward the window & I curled up with her in a kind of spoon fashion. I started to feel her boobs under her shirt, then got up under her bra. This was all new for us both and I grew bolder and put my hand down into her pants. She made no effort to stop me and even adjusted herself to allow easier access to her young pussy. I held her with my other arm around her and cupped her breast while my left hand cupped her pussy, I inserted a finger into her.
As we rode through the night in the dark I gently fingered and explored her virgin pussy. I remember thinking how wonderful it all felt, warm soft & moist. I don't remember if I got much sleep that night. We never discused it or talked about it after these episodes. After that night from time to time we would find ouselves alone and she would start the roughhousing which always led to me feeling her & playing with her pussy. Sometimes she would take off her pants & let me look at it and even pulled the lips open so I could see inside. I can't remember her wanting to touch my dick but i think I showed it to her a few times out of curiosity. I'm sure I masturbated afterwards as I was doing it since the age of 13. She's a beutifull woman today with a great body, when I see her I still remember those nights when we were young, and I was the first man to feel inside her pussy.