Blackmailed by Step Sister

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Word of advice, if you’re gonna listen to something while you jerk off, make sure you have complete privacy, or things could get real bad like they did to me.

It was a while back when I was 15, and I didn’t have a computer of my own back then, and it was really hard to find masturbation material that was easy to hide for me, plus I was still kinda young so I didn’t know all the ins and outs.

I tried to find inconspicuous things to jerk off to, like small clips I could fit in my phone, or pictures in magazines or catalogs.

I had gotten suggestions from a friend in school to use audio materials, and he gave me a clip of a girl dirty talking and making suggestive noises, and so on.

In hindsight, I really should’ve probably locked the door, but I got naked and tried to close my eyes and “enjoy myself”, and I was actually getting into it when I heard a laugh.

I opened my eyes and saw my older step-sister, about 17 years old, with her shiny expensive camera phone (it was a while back, and she got a job to buy the thing), I instantly figured she got a picture or video of me jerking off.

I panicked, and begged her to not tell anyone or show anyone, she laughed and said that I would have to do whatever she wanted from now on.

I know I couldn’t say no to her, and it didn’t occur to me to tell my parents, so I agreed to essentially do whatever she wanted.

To make sure I was going to listen, she told me to finish jerking off, and so I stood there beating off and jizzing into my hands while my own step-sister laughed at me.

From then on, whenever my parents weren’t looking, she would make me do all her chores and treat her nicely and essentially act like her manservant, but that wasn’t the end of it.

One time when my parents were out, she invited a couple of her friends, including a younger sister of one of her own friends, who was around 13 at the time, I guess.

They made me stand in the living room and strip naked while they sat and watched, and then proceeded to play with me and pose me and make me do and say all sorts of embarrassing things, they finally let the younger sister jerk me off until I came before making me fetch them food and drinks from the kitchen.

And this continued until she finally graduated and moved away to college a year or so later, and I was more or less released.