After locking the camera away, our sister stood looking at us
misccheviously for a while.  We stood there, erect, scared, quite at a
loss. 

"Follow me," she said, and left the room.  We crept into the hallway,
then stood, frightened to be completely naked in the middle of the
house.  "Come in here," we heard her say from our parents room.

We crept into their room, petrified.  They were good parents, but they
didn't mind punishing us if they thought we needed it.  And if they
caught us now, they would definitely think we would need it.  But then
we saw what Suzy was doing, and we couldn't believe it--

"Mom's party dress!" Jake and I said in union.  Suzy had put it on
while we were in the hall; she was just now pulling her skirt out from
underneath it.  "You can't do that!  She'll kill us if we mess it up!"
I said.

Suzy turned to show us how it looked on her, though, and we were
speechless.  It covered half her thigh, the deep cut in the front
showing off her small breasts (Mom's were big, so we could actually
see Suzy's nipples this way).  When she ran her hands down her body
and stuck her tongue out at us, I almost came.  I had always gotten
uncomfortably excited by Mom when she was dressed up, and Suzy was
almost as sexy now.  Then Suzy found some high heels, strapless, and
put them on, bending over so we could see her panties.  She walked
over to the mirror to admire herself.  Wow, she was hot, Jake and I
exchanged glances to communicate. When she saw herself, she gasped.

"I can see how they pick up men.  Wow."  She lifted up the dress so it
exposed her entire left leg, muscular and shapely, as we stared,
throbbing with desire.  "You didn't know they pick up young guys and
have sex with them, did you?  They do.  All those times they send us
to grandma's or to a friends?  Yeah, they love an extra guy here.
Once they didn't know I was home, because my friend got sick and I cam
home.  I listened and watched all night--it was crazy."

Jake and I just stared.

"Can I tell you?  I heard them come in, laughing, except there was a third
voice.  They stayed downstairs for a while, then all lumbered up here.  I heard
Dad ask 'Isn't she beautiful', then a mans voice answer 'Boy, yeah'.  Then they
turned out the hall light and I snuck out of my room so I could watch.  When I
peeked in, Mom and Dad were standing in the middle of the room, here."  She
stood in them middle of the room.  "Dad was holding Mom's hands in the air,
sometimes lifting her skirt, as he guided her in a slow pirouette."  Suzy
twirled around, one arm in the air, one hand lifting her skirt so we could see
the edge of her panties in front, then a little bit of her round ass, then all
the way up the edge of her thigh.  "The guy was sitting on the bed, open
mouthed, with no shirt on.  He was actually pretty hot, too, if you ask me.
Then Dad asked him he wanted Mom naked.  Think he said yes?"  We nodded.
Honestly, we had both enjoyed spying on mom before.  Sometimes she would
masturbate when I was home alone, and I would listen at her door.

"So then Dad lifted her dress--" Suzy started to lift, but then stopped and
grinned at us.  "Hey why am I all alone?  Jake come here.  Play you are Dad.
Stand behind me.  I want to play Mom and Dad swinging."

Jake stood behind her, barely breathing from fear and desire.  Suzy
placed his hands on the hem of the dress, touching her legs, then
gripped the dress. 

"Stand back a little, you'll get precum on it and they will kill us all," Suzy
said to Jake, and he obeyed, speechless.  I watched his erect cock, millimeters
from her ass, yearning for her.  "Now lift it until you can just see my panties."
He peered over her shoulder--quite funny to watch-- and lifted the dress until
we could both see a little bit of pink satin, with a few hairs on the edge.  We
both gasped.  "Now let it drop.  That's what Dad did."  He forced himself, but
the dress fell back in place.  She turned to face Jake now, her hands resting on
his shoulders leaning forward.  "Now show a little panties from this view," she
said, and Jake lifted up her dress again so we could see up to the bottom of her
but cheeks.  She paused to let us enjoy, then stood up and faced us again,
slipping out of Jakes grip.  "Do you know what they did next?" she asked.

We nodded No.

"Mom took off the dress and they both sucked her tits...  Would you do that?
Just to play, you know?"  She gingerly took off the dress, tottered over to
closet in her heels, and hung it back up gently.  We watched her pale, slim,
shapely body as she walked over in her panties and high heels, gaping at her as
she reached up to put the dress away, letting her delicious small breasts hang
in the air.  She had very small nipples but they were quite dark and beautiful.
She let us enjoy her, then sat down at the edge of the bed.

"Come her, my pretties, one on each breast."

We walked over and bent over.  I almost came when I took her nipple, small but
firm, into my mouth.  I started to lick maniacally, caressing her breast
lightly. I could feel my brothers hot body and breath next to me, enjoying her
the way I was.  We felt her squirm under our mouths, we knew she was enjoying us.