Growing up we had no supervision after school. We were latch key kids and were supposed to stay inside until my grandmother got home from work. My sister was fourteen and she had these two little tits and her nipples stuck out hard in her shirt. She also wore these stupid little shorts and when she lifted her legs I could see her underwear.

One day it was just too much and I grabbed her and laid on top of her back. I held her down on the rug until she stopped moving. I put my arms under her and grabbed her tits and used my knee to open her legs and slipped between her legs. I had a hard on, it hurt. I got my cock to lay between my sisters butt cheeks and started to dry hump her. My cock hurt so much that I opened my pants and let it out and started to poke it up inside her pants.

with one hand I got up under her underwear and I could feel her pussy. It took a while, but I got her shorts moved over and found her vagina and away it went. I let go of her tits and with my arms under her I grabbed her by the shoulders and humped her for all it was worth. When it was time to come, I just held on to her and came and came until I was dry.

She told me she was going to tell our grandmother, but when the time came she just told me I was a jerk and she kept her mouth shut. I was a jerk with her lots of afternoons.

She and I are so close today closer than most siblings. We live a block apart, down from where our grandmother lived. She is my best friend and pretty much runs my life.