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Blackmailing little sister

I’d been planning this for years in an abstract sense, in a
theoretical sense, before I got my chance to make something really
happen. But when the opportunity presented itself, I grabbed it.

I’m 19 and my sister Sara is two years younger. I didn’t much notice
her beyond thinking she was an irritation until about two years ago.
One day she was this annoying girl, following me around, and the next
she was…something interesting. She didn’t have large breasts, but
they were perfectly shaped, and firm, and she had long legs that
wouldn’t quit. Both of us inherited the blue eyes and blond hair of
our mother, but a while back Sara started hanging out with a goth
crowd and she chopped hers off and dyed it black. I thought it was
stupid, but I have to admit it just makes her blue eyes all the more
intense, and that little attitude she’s got now just makes me wanna
smack her.

Our mom took off when we were kids and our Dad was raising us. He’s a
real bastard, and I was glad to take off for college last year. But I
was back for the summer, and of course Sara was still trapped here
with the hard-ass. Having an asshole for a dad made us closer as
kids, I think, but that kinda faded away when I became a teenager and
was too cool to hang with my little sister anymore.

The night in question Dad was off at some business thing and Sara was
off on a date. She’d lied to Dad about that, of course, saying she
was out with girlfriends, but I’d seen the douchebag with chains and
black clothes pick her up earlier. It was close to ten when I heard
his car pulling up into the driveway, but I didn’t hear the door
open. After a minute I walked over to the window, and saw them in the
car.

I figure Sara forgot I was home, or maybe she didn’t realize what a
great view into his front seat I had from my room. But my eyes
widened as I saw my little sister sucking this guy off in the front
seat. He was lying back with his eyes closed and she was really going
to town. I felt my own cock start to respond, but I didn’t touch it,
because as I watched a plan was forming in my mind. And for this plan
to come out the way I wanted, I needed to be good to go.

I watched as she finished him off–I could tell from his movements
when he came, and dammed if my little sister didn’t take it all. When
had she become such a slut? As they said goodnight, I left the window
and walked over to her room. I took a seat on her bed and tried to
make myself look casual.

A few minutes later she came into her room, unhooking her purse from
around her neck and throwing it on the floor. She caught sight of me
immediately.

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