Caught Masturbating SeXStoRY

This was a long time ago, I was probably only about 14 when this happened. It was the middle of summer and a super hot day. My s****r, who is a few years older than me was having some girls over for a pool party. at 14 that is the greatest news in the world. so my s****rs friends start showing up around noon and i didn't even last until 1230 that i had to go bust a nut. so i go down to the pool house and start doing my thing. i'm thinking about my s****rs friends giant boobs bouncing in my face and i start jerking harder and harder, but the the door to the pool house opens and my s****rs friend cindy is standing there watching me with my cock in my hand. i stop dead still holding on for dear life, but then she surprised me she just stood there and smiled. so i smile back and start going at it again i jerk harder and harder and i can tell shes getting horny. i can tell that i'm about to cum so get ready to blow my load just when my s****r walks into the doorway...i can't stop now so i blast my cum across the room. that was probably the most impressive cumshot i have ever had if flew all the way to the doorway and landed all over cindys feet, now i'm embarrased and my s****r has run away at this point after seeing me cum on her friends feet so i just run out the back door of the pool house and up to my room. i never talked to cindy or my s****r about that day, but i know i haven't forgotten.