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posted by cmn32480 on Monday September 07 2015, @04:05AM   Printer-friendly
from the we-can-now-tell-how-far-far-far-away-is dept.

Astronomers from the University of Cambridge have developed a new, highly accurate method of measuring the distances between stars, which could be used to measure the size of the galaxy, enabling greater understanding of how it evolved.

Using a technique which searches out stellar 'twins', the researchers have been able to measure distances between stars with far greater precision than is possible using typical model-dependent methods. The technique could be a valuable complement to the Gaia satellite - which is creating a three-dimensional map of the sky over five years - and could aid in the understanding of fundamental astrophysical processes at work in the furthest reaches of our galaxy. Details of the new technique are published in the Monthly Notices of the Royal Astronomical Society.

"Determining distances is a key problem in astronomy, because unless we know how far away a star or group of stars is, it is impossible to know the size of the galaxy or understand how it formed and evolved," said Dr Paula Jofre Pfeil of Cambridge's Institute of Astronomy, the paper's lead author. "Every time we make an accurate distance measurement, we take another step on the cosmic distance ladder."

The best way to directly measure a star's distance is by an effect known as parallax, which is the apparent displacement of an object when viewed along two different lines of sight - for example, if you hold out your hand in front of you and look at it with your left eye closed and then with your right eye closed, your hand will appear to move against the background. The same effect can be used to calculate the distance to stars, by measuring the apparent motion of a nearby star compared to more distant background stars. By measuring the angle of inclination between the two observations, astronomers can use the parallax to determine the distance to a particular star.

However, the parallax method can only be applied for stars which are reasonably close to us, since beyond distances of 1600 light years, the angles of inclination are too small to be measured by the Hipparcos satellite, a precursor to Gaia. Consequently, of the 100 billion stars in the Milky Way, we have accurate measurements for just 100,000.

Gaia will be able to measure the angles of inclination with far greater precision than ever before, for stars up to 30,000 light years away. Scientists will soon have precise distance measurements for the one billion stars that Gaia is mapping - but that's still only one percent of the stars in the Milky Way.


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  • (Score: -1, Spam) by Anonymous Coward on Monday September 07 2015, @05:11AM

    by Anonymous Coward on Monday September 07 2015, @05:11AM (#233138)

    Only a half hour until everyone gets home. I must work
    fast to finish the job. I plug in the drill and hurry up
    into the attic. Ah, here is the spot. The drill spins as
    I press in down into the wooden floor. And then, light.
    I pull out the drill and look down into the hole. Yes,
    perfect. From here, I can see all of their room. My
    calculations were right. I race down and go into my
    sister's room; they are twins and two years old than I.

    I look up at the ceiling. With the intricate pattern of
    clowns, teddy bears, and other drawings my parents
    placed on the ceiling when they were young, it was hard
    to see the hole. Yes, even though I knew where the hole
    was, I was hard pressed to see it. A quick cleanup with
    the vacuum and the room was returned to normal... or so
    it seemed.

    That night, I was curious to see how well my idea had
    worked. I crept up the attic stairs, which were in my
    room. Slowly, I moved towards the light beam coming up
    from the hole in the floor. My eye pressed down over it,
    I looked. Inside, I could see my sister Becky sitting at
    her desk doing homework. She was the smarter and quieter
    of my two sisters. Her 16-year-old identical twin Robyn
    was looking over a Glamour magazine while she listened
    to some music on her box. Most people can't tell then
    apart, but for their brother, it was no problem.

    After a few minutes I got bored. Sure, I had a great
    view of the room, but so what? I crept back down to my
    room. About an hour later, I felt a bit sleepy and so
    started to get ready for bed. I slipped out into the
    hall to use the bathroom, but when I saw the door open,
    I slipped back in. I watched as Robyn darted from the
    bathroom in a towel and into her room. Suddenly I
    realized, this was my chance.

    I closed my door and raced to the attic and the hole.
    There was Robyn, still in the towel. She brushed her
    hair as she looked into the mirror. Becky, she was still
    hard at work over her books. And then, the moment I was
    waiting for. Robyn opened the towel and dropped it to
    the floor. Her back facing me, I looked at her butt.
    Instantly, my teenage hormones kicked in and I could
    feel a boner coming on.

    Then she turned around and for the first time I was able
    to look at her in the buff. Her breasts were on the
    small side, but still rather pronounced.
    A glance at her pubic area revealed a thick patch of
    black hair. Robyn walked over to her bed and grabbed her
    nightshirt and pulled it over her head. What? No
    underwear. This was interesting.

    But then, it hit me. This was my sister. I wasn't
    supposed to be looking at her body. I wasn't supposed to
    have an erection for her. But, the more ashamed I felt
    about it, the hornier I became. After all, I was just
    looking. Nothing wrong with that, right?

    I decided not to wait for Becky. She would be at the
    books for a while. And besides, I really had to relieve
    myself. So I slipped back into my room. I grabbed the
    pillow off my bed and a spare that we keep in the closet
    and tossed them on the floor.

    Being 14, jacking off was now a way of life for me. I
    started a little over a year before. I'd tried all sorts
    of things since, from using my hand, to using a roll of
    toilet paper to pillows.

    Well, tonight I was in the pillow mood. I got down on
    the floor and pushed my penis up, so the head was
    touching my navel. Down I went, until my cock was
    trapped between me and the stack of pillows. My hands
    went under the top pillow and settled right below the
    groin.

    Slowly, I slid my lower body back and forth. Every once
    in a while, I'd push upward with my hands to gain a
    little burst of extra feeling in my prick. Just as I was
    about to ejaculate, I sat up and grabbed at my pole.
    Placing a tissue at the tip, I pulled with my free right
    hand until thick white cream shot into the tissue.

    A little curious, I looked at the tissue. It wasn't
    totally white, but had a little yellow tinge to it. And
    there were these really thick rubbery things floating
    around in the pool sperm. I placed a finger in to feel
    them. Whenever I have to piss, I get this yellow tinge
    and the rubber bits. Seemed obvious why, so I never
    worried. A squeeze on the head of my penis produced a
    glob of seaman on my prick. I wiped it off with my
    finger and then ran the finger down my penis.

    Time to clean up, so I wiped off my finger and my cock.
    I wrapped the tissue in a piece of paper and tossed in
    the crumpled paper into a brown paper bag I had hidden
    under my bed. Looking inside, I could smell the smell of
    old sperm. And from the amount inside, it was obvious I
    had been jacking off a lot recently. Every few weeks, I
    take the bag to school in my backpack and lose it in the
    dumpster behind the cafeteria.

    *

    The very next night I went back up to the attic to see
    what I could see. The thought of Robyn's breasts had
    been on my mind all day. During lunch, I went into the
    boy's room to jack off. I stepped up to the urinal and
    pulled out my dick and rapidly jacked it back and forth.
    But then, Mr. Summers, the principal walked in and I had
    to stuff myself back into my pants and leave.

    And the thought of her lower region, the thick black
    hair covering the stuff that made her a woman. But no,
    she was my sister. Breasts were one thing, but this was
    her sexual stuff.

    I looked through the hole. As usual, Becky was at work.
    Robyn was in the shower and would obviously be entering
    the room soon in her towel. And sure enough, she did. As
    one sister entered the room, her twin got up from her
    books and went to shower.

    Fascinated, I watched as Robyn dropped the towel again.
    But this time, instead of just putting on her
    nightshirt, she sat down on her bed naked. She lifted a
    hand and started to stroke one of her breasts.

    The sight of this was almost too much for me as my cock
    stiffened in my pants. Then, she wrapped one hand around
    each breast and squeezed. It didn't take much, since she
    wasn't one of those super porn models in the nudie
    magazines, but she did have a grip. Her face revealed a
    gentle sort of pleasure. I wished, just for a moment
    that I could be doing that to her myself. That I was the
    one squeezing her tits. Or any girl's tits for that
    matter.

    Robyn leaned back, with her closed legs facing my
    viewing angle. I could only see her legs, until... she
    opened them. The black patch of hair led to the spot
    between her legs. An intricate pattern of womanhood
    moved down to her butt. I recalled the nudie magazines
    and the pictures of pussies that 'd seen. I had learned
    about the lips and the clitoris and all that kind of
    stuff.
    I had always though that it looked a bit gross, but that
    made it all the more interesting. How could something so
    odd looking bring such incredible pleasure I wondered.

    I watched her, forgetting who she was, as she lightly
    slid her fingers up and down her slit. From the asshole
    to the patch of pubic hair. The she placed her index
    finger and her middle finger on either side of her
    vagina and pushed them apart. This opened up her hole,
    which she quickly filled with the index finger of her
    other hand. She used that index finger to play around
    inside of herself. I likened this to sticking my finger
    up my butt, something I was not prepared to knew that
    she was using the finger to simulate a penis. That what
    she was doing was making her feel nice.

    Monetarily, I felt sorry for girls. They had to resort
    to sticking their fingers up their cunts in order to
    feel good. All I had to do was rub my cock. But then
    again, she wouldn't be making a mess. When I
    masturbated, that goo would shoot all over the place, I
    had to be careful about that.

    Once, I was rubbing my penis up and down my pillows and
    wasn't very fast in getting up. It felt so good that I
    just kept on rubbing. And I came. I could feel that
    thick warm stuff getting all over me. I jumped up and
    looked down. All over my pillow and me, there it was. It
    was a bitch to clean up. But girls, they didn't have to
    worry.

    I glanced at Robyn's face. For the whole time, it was
    like she was a stranger. Just a twat and some fingers.
    But now, I watched my own sister's face. Her eyes were
    closed and she was smiling a goofy smile. What was a
    girl orgasm like, I wondered?

    And then, oops. The door opened and Becky walked in. As
    with Robyn, she was in a towel. She stared at her
    identical twin as she played with herself. Robyn, in
    fright, jumped up and closed the door. "Do you want
    Brian or Dad to see me?" She seemed more concerned that
    I might see her in the nude than the fact that she was
    being caught masturbating. Had Becky seen Robyn do this
    before? Did Becky do it too?

    What Robyn did next, shocked me. I had heard about it. I
    had even seen it in the magazines. But my own sisters.
    Robyn leaned over and gave her sister an open mouth
    kiss. Sure, they were sisters, but this seemed just too
    strange. A quick kiss on the cheek, that's one thing.
    But this long open mouth kiss... That was lesbian! Even
    with the arousal of a nude body and the masturbation, my
    penis started to shrink. The scare I'd just had caused
    me to go flaccid. But I couldn't move. I just watched,
    curious to see what would happen next.

    Without breaking the kiss, Robyn opened Becky's towel.
    Normally shy Becky stood there, nude, in an embrace with
    normally wild Robyn. The mirror image was amazing. The
    breasts, the bodies, the pubic hair. It all matched
    exactly.

    A hand, Robyn's, slid down Becky's leg and disappeared
    between her legs. Instantly, my dick sprung to life
    again. I had forgotten they were my sisters again, and
    instead concentrated on the action.

    Polite and shy Becky didn't seem to mind what her sister
    was doing to her and returned to favor by placing her
    palms just above her twin's breasts. She slid them down,
    following the slight curves of Robyn's tits. They broke
    their kiss and continued exploring each other's bodies.

    Then finally, Robyn guided Becky over to the bed and
    carefully pushed her down. She pushed open her legs to
    reveal to me her privates. Even though the first vagina
    I saw was beautiful, this one seemed even better. I
    suppose it was because I knew Robyn to be a little wild
    and seeing her naked wasn't as shocking as seeing
    prudish Becky displaying her slit.

    In fact, for the first time, I noticed the wild one's
    pussy. The hair was in a neat patch, almost as though
    she'd trimmed it, perhaps by shaving parts. The one on
    the bed now was more natural. The innocence of it all
    making her more beautiful and sexy than any slut in a
    magazine.

    I shifted my weight, trying to release some of the
    pressure in my pants. It was no good, so I opened them a
    bit and slid them off. I kept my underpants on, but it
    still felt better.

    Towards the fresh, likely virginal, cunt her face moved.
    From my position, it was hard to see what was going on.
    However, I was sure that Robyn was giving her sister a
    real tongue job. I wished I could see it, for I'd never
    seen one before.

    On and on they went, feeling each other up and licking
    areas of the body that really weren't made for licking.
    It was all too much for me. I slipped back down to my
    room and lowered my underpants, bringing my dick out
    into the open. I looked at my naked body in the mirror,
    pretending I was a porno star. I grasped my dick and
    mouthed the words "I'm going to put it in you" to some
    imaginary co-star. The act got boring, so I decided to
    get to work.

    I walked over to my desk, my stiff prick bouncing with
    my step. From underneath, I pulled on a piece of tape
    and down came three foil-wrapped condoms. Shooting off
    in a tissue was a little inconvenient and I wanted to
    try these things out. I got them from one of those
    vending machines in the bathrooms at the mall.

    RIP, I tore open one of the packets and pulled out the
    ring. I looked at it, remembering back to one of those
    sex-ed books I managed to find. I placed on the head of
    my penis, and slowly began to unroll it over my 14-year-
    old cock. I closed my eyes, pretending that I was a girl
    doing it for me. First, I saw a woman from one of the
    nudie magazines. Then, it was my sister. I wasn't sure
    which one the twins it was, and it really didn't matter.
    Finally, I hit my scrotum and I looked down. Covering my
    rod, there was this thin sheet of latex. The way it
    looked, the newness of it all, was great. Again, a
    glance in the mirror. Now, I was ready to put it to the
    test.

    I took my blanket and wrapped it around my cock and
    pushed the rest between my legs. I leaned forward,
    supporting my chest on the pillow. Pump. The blanket was
    the perfect simulation, to my knowledge at the time, of
    a vagina. The slick inside of the condom made the
    experience in orders of magnitude better than any other
    experience I had ever had. I slid my legs in and out.
    In, I could feel the pressure on my dick. Out, my cock
    pushed its way into the blanket and the tip hitting the
    bed.

    Back to my fantasy. Back to the lesbian sex I saw. Back
    to me fucking my teenage sister. In fact, it didn't
    matter who I was fucking, so long as I could come. And,
    with an in stroke of my legs, it started. Except that I
    had put so much pressure on my cock that the come
    couldn't shoot out. But it pumped and pumped. And it
    felt fantastic. Out went my legs, and the pressure was
    released. And so was the cum. I shot more than I had
    ever shot before. Exhausted, I fell asleep in that
    position. Of course, the messy details of my waking up
    with a shriveled penis and a used condom are
    unimportant.

    *

    After what I saw, I was excited about going up to the
    attic to peek on my wonderful sisters. It was no longer
    a matter of who they were. I wasn't touching them, so it
    all seemed OK. It was just a harmless fantasy.

    Unfortunately, for weeks, nothing happened. It was quite
    boring watching Robyn listening to music and Becky
    reading. Back to the magazines.

    And then, one day, something happened. I got home from
    school to find a note from my parents. It seems that
    they were going to be away for the whole night on
    business in New York. Of course, there was a warning
    that I was to do what my older sisters said. Becky, the
    responsible one, was in charge.

    I spent the evening in my room watching television. The
    doorbell rang, but since Becky was in charge, she should
    get it. It rang a second time before it was answered. As
    the visitor followed Becky to the twins' room, I peeked
    into the hall. It was Brad, the guy that Robyn had been
    going out with. He was a great guy, helping me with
    getting my baseball pitch right and all. Yup, Robyn
    couldn't have picked a better boyfriend. Becky, on the
    other hand, wasn't really into dating. Even though she
    was just as good looking as Robyn (naturally), she came
    off as a brainiac.

    In our house, you have to be 15 to go on real dates. It
    was OK to go out with a group of mixed-sex friends, but
    it had to be a group. I couldn't wait until I turned 15
    and was able to ask out Donna Langley. She was the best
    looking girl in the class.

    Curious to see what boyfriend and girlfriend talk about,
    I made my way to the attic. What I saw when I peeked
    down stunned me. I was thunderstruck!

    There was Brad, standing with his shirt off. Robyn was
    kneeling in front of him, opening his pants! And off in
    the corner, Becky was pulling her shirt off.

    I was having a hard time breathing now. What I was
    seeing below me was beyond anything I'd ever imagined. I
    couldn't believe that both of my sisters were doing
    something like this!

    I gasped in utter surprise as Robyn tugged at Brad's
    underpants until his penis fell out. Without a word, she
    placed a hand of his limp penis and guided it into her
    open mouth. In amazement, I watched as she started to
    suck him. Her head sliding back and forth. His cock was
    now erect, and it glistened with saliva as she slid her
    mouth fully off. He was fairly well endowed, I thought.
    In fact, I wished that I was that big. Not that it much
    mattered, since all I was going was jacking off. And
    yet, I wanted it.

    Sweet Becky sauntered over to her look-alike. She was
    naked. Once again, I was awe-struck by her thick patch
    of black hair and her wonderful butt. It didn't take
    long for her to lie down and for Brad to start licking
    at her pussy. And this time, I could see everything. His
    tongue sliding up and down her crack. Every once in a
    while, disappearing inside her.

    Robyn returned to the scene, also nude. As her boyfriend
    bent over to eat her sister, she goosed him. She placed
    her groomed pussy to his ass and reached around to
    stroke his penis. She was slow and careful. Every once
    in a while, she'd kiss his back.

    Brad picked his head up. For the first time, he spoke.
    "How about I put it in you tonight?" Becky, shocked out
    of her sexual trance, sat up. Her response was that she
    was not ready for that, just yet. Brad, being the nice
    guy he was, told her it was OK.

    But then again, he actually got what he wanted. The
    girls switched places and he got ready to stick his dick
    inside of Robyn. No doubt in my mind he'd done this to
    her before. But still, seeing it happen was a bit too
    much. I wished I could get a closer look. But before he
    could start fucking at her, Becky decided she wanted in
    the action. She bent down and started to lick at his
    dick. It looked obscene the way she went at him, I was
    about to blow my load with nowhere to go.

    Because Brad was partially stuck inside her twin's cunt,
    she just continued the job down to Becky's asshole. And
    back up again, over Brad's balls to his butt. Slowly,
    Brad started pumping up and down and Becky tried to keep
    up.

    Alas, she could not. Instead, she climbed up on the bed
    and straddled her sister's face. As Brad fucked Robyn,
    Robyn eat Becky's cunt. And Brad, realizing that he was
    lucky to have two beautiful girls, placed one hand on
    one of Becky's boobs, while he used the other to brace
    himself as his cock slid in and out of Robyn's willing
    body.

    Man, I was going crazy. I wished I could be down there.
    I wish it was me getting it on with two girls. I didn't
    care if they were my sisters; I just wanted to be able
    to explore a real girl.

    My thoughts led me away from the action. When I finally
    was jolted back to reality by a moan, I noticed that
    Brad was pulling out of Robyn. And Becky, that look on
    her face. It looked just like those pictures of women
    having orgasms. I was happy to see my sister this way.
    As Brad pulled out, it was clear he had come also.

    No sooner had her orgasm ended, Becky jumped off. "I
    want that!" she said. Quickly, she went to work
    returning the oral action on her sister, cleaning out
    Brad's cum. I was seeing Becky in a new light. She was
    loud, brash, and sexy.
    Brad, on the other hand, was not so nice as I had
    though. While this was going on, he was dressing and
    left. Hey, when and if I ever get to fuck a girl (much
    less two), I wouldn't just leave.

    The girls didn't seem to mind. In fact, Becky got Robyn
    off fairly quickly. After their little fuck fest, they
    got in their robes and slid out into the hall. I quickly
    dropped back to my room and peeked out. The two of them
    went into the bathroom together. The running water in
    the tub suggested to me what was going on.

    By this time, I was ready to explode. Right there, with
    the door open, I pulled down my pants and quickly jerked
    at my cock. Within seconds, I could feel an orgasm
    approaching. In a panic, I grabbed the nearest thing
    that would contain the rush of seaman. Down there, on
    the floor, was the laundry basket. Mom had done the
    laundry and had left the basket in the hall for us kids
    to put our stuff away. On top, was a pair of panties. I
    was in a hurry, it did not matter. No sooner had I
    placed the smooth fabric to my cock had I started to
    squirt. It was a long and creamy one. And it felt great
    to finally be relieved of that.

    I looked down at the material in my hand. Then, the
    bathroom door started to open. Quickly, I jumped back in
    my room with the panties and watched. Robyn and Becky
    slipped out of the bathroom naked. Their wet bodies
    glistening in the hall light. Their robes in their arms.
    Slam, their door closed behind them.

    Now what? I looked at the panties. They belonged to
    either Becky or Robyn. I looked at the little tag
    inside. A big red "R" covered the washing instruction.
    At first, I though Mom was smart. Putting an "R" for
    Robyn would make it easy to tell which clothes belonged
    to which twin. But then, it hit me. Mom calls Becky
    "Rebecca." Now what? Did it matter? I had shot my load
    in one of the twins' panties. I couldn't put them back
    in the basket. So, it was off to that secret bag where I
    store used tissues, condoms, and now panties. Who'd ever
    suspect me of stealing my sisters' panties?

    *

    After that, I was a bit afraid to go back to the attic.
    I felt a little funny about it all. I also stopped
    masturbating. I was difficult, but I swore that I would
    go one month without jacking-off as penitence. As one
    might imagine, for a 14 year old, there is nothing
    harder.

    Then, on the one-month anniversary of what seemed like a
    lifetime sentence, I got a great chance. Everyone was
    going to be out of the house all day. I would be alone
    for a whole day to do what I wanted. Thinking back on
    the past month, I knew a fuck-fest was in order.

    I spent most of the time looking through magazines.
    Then, it was to the videotapes. We didn't have any
    porno, but there were plenty of scenes in R-rated films
    that did well. I would fast-forward to the nude scenes
    and watched them over and over. I would pause and look
    at the breasts that I saw on the screen. It wasn't any
    more exciting than looking at the hot stuff in the
    magazines, but since there was now motion... And every
    once in a while, there would be a patch of pubic hair.

    That gave me an idea. Why not make my own porno. I'd
    pretending many times before. But now, I could do
    something about it. Next to the television was the
    camcorder. And here was a blank tape. After a bit of
    setup, I was ready to go.
    Thank goodness for the fact that camcorders let you
    watch of the screen what's being recorded. I watched, as
    I pulled off my clothes in some silly strip tease. There
    I was, in front of the camera, naked. From all the
    magazines and movies, my prick was stiff. I stoked it
    for the camera.

    Zoom in on the couch. I went over and started to hump
    some pillows, as I had done before. All the time,
    watching the action to make sure it looked great.
    I was ready to orgasm, and I knew that I would need to
    make it special. Back to the camera to get a really good
    zoom on the couch. I sat down with my penis sticking
    into the air. I stroked it up and down until the first
    bit of cum shot upward. I kept pumping as I pointed my
    cock towards my face. None of it should end up on the
    couch, so I was careful to make sure that, as I milked
    my cock, it all landed on me.

    And then, I was done. I looked at the screen. There was
    my butt. Between spread legs was my cock getting smaller
    and smaller. As I slowly sat up, the pool of sperm slid
    down my chest. Quickly, I scooped it up with hand. For a
    final show, I rubbed the goo all over my chest and cock.

    With my clean hand, I pressed the STOP button on the
    camcorder. I left everything on, as a quick shower was
    in order. As I though about it all as I showered, I got
    another erection. Having just orgasmed, it wasn't as
    strong. But the hard-on was still there. Using the soap
    as a lubricant, I quickly jerked myself. Despite having
    just come, I was able to pull it off. Not a lot, but
    enough. For the first time in my life, two orgasms
    within ten minutes of each other. I had thought it
    impossible.

    After rinsing off and drying off, I left the bathroom
    naked. No one would be home for a few hours and I wanted
    to see the video. But, as I passed by the window, I
    could hear a car pull into the driveway. I peeked out,
    it was Becky and Robyn. Quickly, I zipped back to the
    bathroom and got dressed.

    Down the stairs, pretending nothing had happened. As I
    enter the den to say hi to my sisters, terror struck.
    The tape! It was still in the camcorder. Maybe they
    wouldn't notice that I had left the television on. I was
    wrong.

    "What's with the TV?" asked Becky? Robyn was about to
    turn it off when she noticed the little light on the
    camcorder. "Wait, lets see what's on this tape,"
    announced Robyn as she pressed REWIND.

    My next reaction was a bit of a shock to me. Instead of
    terror, I saw a chance. "Look, that tape is personal.
    But I'll tell you what, I'll let you see it, if you
    don't tell anyone." The girls looked confused. "And, to
    make sure that you don't say anything... I saw you two a
    few weeks ago with Brad." Becky's cute face turned to
    horror. Robyn smirked.

    "OK, little brother. What'd you see?" I responded to
    Robyn's question with a simple "Fuck and suck." Becky
    was really mortified. Robyn and I were on the same
    wavelength. She knew I held a terrible secret about her
    and I knew that if anyone knew about the tape, my life
    would be over. "Bec, he's not going to tell," she glared
    at me. "And, obviously, this tape is not something he
    wants anyone to know about. So, why don't we all just
    keep our secrets?" I felt better. Becky calmed down.
    Robyn was still smirking.

    As Robyn got ready to start the tape, I though about the
    contents. Did I really want my sister's to see my jack-
    off? They were my sisters after all. But then again, I
    had already seen them do some nasty things. I guess it
    didn't matter.

    The three of us sat on the couch as the tape started. I
    sat poker-faced. Becky sat with her hand covering her
    mouth in embarrassment. Robyn smiled. I was quite a
    video. I had never really been able to see myself do
    these things before as I was so wrapped up in reaching
    an orgasm. It was really quite educational.

    When it was over, Robyn was the first to talk. "I know
    about the attic." She knew. But, after letting them
    watch the tape, it didn't matter. Becky looked puzzled.
    Obviously, she didn't know.

    The three of us spent the afternoon talking about what
    we all knew. I told them about the hole. I told them
    about seeing them doing the lesbian thing. I told them
    about Brad.

    They were my sisters and were quite helpful in
    explaining about what I saw. They were cool and it and
    about the tape. They even helped me hide it. And we
    covered the hole in the attic.

    As the day ended, we swore that no one else would ever
    know. And then, it was all forgotten. I was glad it was
    over.

    *

    Well, not quite over yet. Weeks later, the three of us
    were home alone again. Needed a break from homework, I
    headed down to the den. There was Becky and Robyn on the
    couch watching television. And they were watching my
    tape.

    "I thought it was over?" Robyn was quick to reply,
    "C'mon, we're pretty impressed. In fact, we're been
    thinking..."

    Becky smiled. "...You've seen us live and in the nude.
    What'd you look like off camera?"

    All those lustful thoughts about them came back to me.
    Along with that, all the guilt. And the lust won.

    Robyn got up and knelt before me. It was just like with
    Brad.

    She placed a hand on my groin and started to open my
    pants. Snap. Zip. She slid my jeans down. Pulled my
    underpants were down. Inches from her face, my flaccid
    penis hung. OK, she had her look. Now what?

    I should have guessed it. She placed a warm hand on my
    cock and lifted it up. She licked along the bottom, from
    my balls to the tip. The feeling was so great that I
    lost all sense of where I was. I forgot this was my
    sister. My prick hardened.

    I let her suck as I gazed off into space enjoying my
    first encounter with a real girl. I watched, dazed, as
    Becky stripped her clothes off.

    "Brother dear... how'd you like to break in a virgin?"
    asked Becky. I was shocked and pulled back, my hard
    penis pulled from Robyn's wonderful mouth.

    "Yes, I've never had any man inside me. I was waiting
    for the right one. I love you..." This was too good to
    pass up. On the one hand, I was horny and curious. On
    the other hand, I knew it was a no one to fuck one's
    sister. Again, my dick won the war with my brain. But,
    my brain did get one good idea in. If I was going to do
    this, I was going to wear a condom.

    "I love you to..." and I rushed back to my room, my
    penis jerking back and forth, to get my condoms. When I
    returned, both sisters' were nude. Robyn was fingering
    Becky's twat. "Just loosening her up," she said with a
    smile.

    I held up the foil wrapper. Robyn snatched it from me
    and opened it. Expertly, she placed it on me, unrolling
    it over the shaft. "You're pretty big, for a guy your
    age." It didn't matter if it was true or not. "Lie down
    and let Becky do all the work."

    I did as told, on the couch. Becky climbed up and
    straddled me. As she lowered herself over my rubber-
    covered cock, Robyn helped. She helped to guide me
    into Becky.

    Slowly, I slid in. The feeling was wonderful. Despite
    being a virgin, I knew that she'd had plenty of finger
    and oral stimulation. And finally, she was down. I
    looked. There was her muff. And mine. Between them, the
    rubber ring of the condom.

    As she slid up and down, Robyn caressed her twin's
    breasts.

    I whole thing, it was too much for me. My butt tensed.
    Blam! I came.

    That's when I woke up. I looked around the dark room. I
    was alone. It was a dream. All of it? Or just part? I
    was disoriented. I started to get out of bed to
    investigate. But the wetness in my pants stopped me.

    I'd had one hell of a wet dream. God, it's hard being a
    teenage boy...

    THE END

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  • (Score: 0) by Anonymous Coward on Monday September 07 2015, @08:03AM

    by Anonymous Coward on Monday September 07 2015, @08:03AM (#233179)

    You missed the bit when the dad came home, and being a cop. Had no choice but to arrest them all for kiddy porn and have them placed on the sex offenders list.