"Ok Sis, we'll be upstairs in a minute."

I was 15, my brother was 16, and my sister had come home from college
for the summer--she was 19.  Jake and I were playing a video game
downstairs when we heard her call.

"Hurry.  I need help."  

We put down are things and went upstairs to her room.  We walked in
and saw her sitting on the bed, reading a magazine.

"What do you need help with stupid?" Jake my older brother asked her.
"I was about to kill Steve in Death Force."

"You were not," I said.

"Yeah I was" he said, looking ready to punch me just for fun.

"Whoa!  You are such immature freaks!" Suzy yelled at us.  "I just
wanted some company.  But if I said so, you wouldn't have stopped
playing that stupid video game."

We nodded at each other, and then stared at her blankly.

"Aren't you going to ask if I am OK?  Maybe I am sad!  Do you guys
know anything about girls?"

"Umm, Sis, is everything going all right?" I asked sheepishly.

"No! It's not!  I miss Joey!"  Then she laid down and started to cry.

Jake and I sat on either side of her and touched her back and her
shoulder as she sobbed.  She was wearing a thin tee shirt and a short
skirt, and I think we both noticed how pretty she was.  Her black hair
was cut short, exposing her pretty neck.  My gaze rested on her the
back of her thighs, exposed by a rumpled skirt.  Jake was trying to
look sympathetic while staring at her exposed midriff and underside of
her breast.

"You guys have never fallen in love, you don't know what it's like."  

She waited for us to respond, perhaps defend ourselves.

Then she turned around and looked at us, devilish behind her tears.
"Sometimes I wonder if you like each other best, and you don't need
any girls..."

Both Jake and I blushed crimson.  It wasn't that we didn't like girls,
it just that, well, we liked each other also.  And we were already in
the same house together, so, well we helped each other out.  But we
never suspected that she knew.

"No, no, never, I mean..."

"Are you kidding, this little shit, I mean, never..."

She just sat there smiling.  "Dad would kill you if he found out."

We were mortified.

"So.  What do you guys like to do to each other?"

We just stood there.

"Come on.  You can tell me.  I had a lot of kinky friends this year in
college."

We looked at each other.  We had both watched her guys when she was in
high school and living at home, but nothing kinky ever happened.  Did
watch her get fucked by a few guys.  Funny that she never seemed to
hide it.

"Like this year. Joey was my guy, I told him all my problems, he was a
real soul mate.  But he had a friend, Max, and we all used to, well,
you know, get together."  She blushed--we had never seen her blush
before.  We also noticed each other's growing erections.  "It was,
well, really, really fun." She sat up on the bed, leaning against the
wall, her legs crossed but still showing underwear.  "You know what I
really liked?  Watching them suck each other.  Wow.  I miss that."

She stared at us meaningfully, but we couldn't do anything except
blush and look down.  We were pretty immature.  I could see that Jake
was rock hard, and so was I, but we were absolutely frozen.

She looked at Jake and narrowed her eyes.  "Come on big boy, let me
see your technique."  His mouth parted a little but he couldn't move.
She got up on her knees and got close to him;  she put her hand behind
his head and gently pushed him until his face was inches away from my
crotch.  "You're older, you have to show him.  Hehe.".

Trembling, he undid my pants and my erect cock jumped out.  Suzy
watched his face and my cock, while I stared at her nipples as they
pushed against her tee shirt.  As Jake started to lick me lightly, I
remembered the times I had lingered in the hall, trying to get a look
at Suzy as she got dressed.  I had gotten to see her naked a couple of
times, when she left the bathroom door ajar and fixed her hair after a
shower, her pink nipples visible in the mirror, her black haired cunt,
her pretty little ass.

"Take him in your mouth," Suzy told Jake, pushing him a little bit.
He did, swirling his tongue on my foreskin.  I grabbed his head, right
where I had grabbed it many times before, but today Suzy's hand was
there.  She held my hand down when I tried to move it away.

"He's a good cocksucker, isn't he?" she asked me, grinning, running
her fingers through his hair as bobbed up and down.  "But then you
have a really nice cock to suck, too, it looks like."  I blushed, but
I moaned too, as I watched my precum stick to Jakes mouth as he slowly
came off my shaft before going down again.  I reached down to pull of
Jakes shirt, exposing his strong chest and shoulders.  I rubbed his
shoulders while he licked and sucked me, looking into my sister's
beautiful eyes.  She leaned down behind Jake and kissed his neck,
behind his ear, then his cheek while he had me in his mouth.  "Let
me," she whispered, and took my cock out of his mouth. Jake wriggled
out of his jeans and underwear and started to touch himself while she
took me in.  I could see him stroke his hard cock, sometimes clasping
it, sometimes lightly caressing it.  I threw off my shirt then too,
enjoying the nakedness of me and my brother, as we had done many times
before.

I thought I was going to die when she took me in her mouth.  I
couldn't count the times I had masturbated thinking about her sucking
me.  Now I watched as the tip of her tongue teased my glans and my
foreskin, her red lips so close, her green (green?) fingernails
wrapped around my shaft.  Jaked just stared at her beautiful face as
she took me inside her mouth, swirling her tongue as she descended.  I
just about came, but she backed out like an expert, taking me just to
the edge.

"I'm pretty good too, huh?" she giggled, my precum sticking to her
face.  "Here, give it a lick, Jake" she held my cock steady while he
licked it, making me shudder with pleasure.

Suddenly Suzy stopped and got off the bed.  Jake and I stood still,
stunned, immature as always.  She went to her desk and, before we knew
what was happening, grabbed her digital camera and took three shots of
us naked and hard, looking quite guilty.

"Blackmail," she said and grinned.  She threw it in her safe and
locked it.  "Now you are my slaves, but it won't be so bad, I
promise."  Now follow me....