1st time caught

The first I was a teen freshman I think sister was a couple years younger so I had a few hr's alone after school to jerk off we lived some what in the country and I would get naked and walk around the yard when it was warm enough or the house if the weather didn't cooperate. This day I had stripped down was in the living room with a Montgomery ward catalog jerking off to the lingerie section when out of no where sister appeared ,, caught me hard cock in hand I ran to my room which meant I had to run right past her she was yelling she was going to tell I thought i was dead once my parent found out . then she knocked on my door she she would keep it a secret if I did what ever she said from then on . what choice did I have I agreed. 1st thing she wanted was to watch me finish so I did .thinking back it was pretty hot . She never did tell the folks but she did make me do it for her and a few of here friends when they would sleep over that was cool some punishment .!!