I was bored out of my skull, it was a Friday night and I should have been out enjoying myself, but everything had gone wrong that day, first the party one of my mates at school was giving was cancelled, then I discovered that most of the crowd I hung around with had been collared by their parents to do various things. So I was forced to stay home, across the room my twin brother was looking as bored as I was, not that he looked like me at all, we weren't identical twins just born within a minute of each other, me being the oldest by that minute. There we sat, two fifteen year old boys, and there sat our eighteen year old sister who had been assigned to baby sit by our parents who had gone off for a long (and I suspected dirty) weekend. Don't get me wrong, I love my sister and I think she's a dishy bird, but at fifteen I felt a bit miffed that my parents thought a baby sitter necessary.
"What's on the box Pete?" I asked my brother.
He picked up the telly guide, glanced through the listings and sighed.
"Bugger all." he replied.
"Andy," my sister said, "why don't you read a book or something."
"I don't feel like reading Becky." I replied.
"So what do you fancy?" she said sharply.
"Hell," I grinned, "I don't know, but sitting here doing bugger all is not my idea of fun."
"Put a video on." She suggested.
Peter got out of his chair and walked over to the video shelves, he winked at me and pulled a video off the top shelf, I grinned at him, as I knew that the top shelf was dad's collection of hard-core porn. From where she sat on the couch Rebecca couldn't see what our brother was up to, assuming he had picked one of the action video's she went back to her magazine. I watched Peter put the tape in the machine and turn on the telly, using the remote he set the telly to the video channel and grinned at me.
"Can we have a drink Becky?" he asked.
"I suppose so," she sighed, "pour me one while you are at it."
My grin widened when I saw Peter pour out two thirds of a glass of vodka and top it up with tonic and a dash of lime, he then poured himself and me a quadruple scotch and added some dry ginger mixer. Handing the vodka to our sister and one of the glasses of scotch to me he grabbed his own glass and sat down in his chair, both of us watched as Rebecca took a large swallow of her drink, she coughed and we both thought the game was up.
"You always put in too much lime." She said and we breathed a sigh of relief.
"Sorry." Peter said with a huge grin.
Peter started the tape going, I noticed he had muted the sound, which meant our sister wouldn't notice what we were watching for a while, as long as she kept her nose buried in her magazine that is. I didn't really miss the sound, the action was what held my attention, sipping my drink I watched a woman meet two blokes at a flat, after a brief bit of chat they all stripped and got down to some serious fucking. The film had reached a point where after the woman had sucked the dicks of both guys they were fucking the woman, one in her arse, and the other in her pussy and at that moment Rebecca looked up.
"What the...?" She exclaimed.
Peter and I looked at her pretending innocence; she drained her glass and looked from one to the other of us then shook her head.
"Peter," she said, "Andy, don't pretend to be innocent. You are a pair of sods."
"Aw, come on sis," I wheedled, "we've been watching it for half an hour, can't we at least finish the tape?"
"Alright," she sighed after a moment of thought, "but at least put the damned sound on."
My brother turned the sound on and the room was filled with the noise of a woman screaming with pleasure and two guys grunting as they fucked her. Pleased with myself I settled back to watch the film, but somehow I'd lost interest in it, looking at my brother I saw he was glued to the screen and when I looked over at my sister I was surprised to see her leaning forward to see the action better. It also surprised me to see her hand squeezing one of her boobs, grinning I looked at my brother and gave a quiet cough, he glanced up at me then looked in the direction my eyes were signalling him to look, he grinned and looked back at me.
"She's randy." He mouthed to me.
"She's not the only one." I mouthed back.
We turned our eyes back to Rebecca who was by now crossing her legs tightly; obviously she was getting more pleasure from the film than we had. Suddenly she looked up and noticed us watching her.
"God," she sighed, "what now?"
"Having fun?" I asked innocently.
"What?" She responded.
"Feeling good?" Peter asked.
Our sister knew we had caught her out, her hands guiltily dropped to the couch and she uncrossed her legs.
"What if I am?" she said defiantly.
"Well we could help you." I laughed.
I'm not quite sure why I said it, probable to get a rise out of her; she looked at me then at Peter.
"You two." she laughed, "Don't make me laugh."
"Oh yeah!" I retorted.
"Neither of you would know what to do if your lives depended on it." She stated with a loud laugh.
"You're asking for it sis." I said.
"Yeah." Peter chipped in.
"You wouldn't dare." She roared with laughter.
Rebecca really should have known better than to say those magic words, then again maybe she did know what she was doing. To my brother and me a dare was like a matador's cape to the bull, the trouble both of us had got into because we could not resist a dare was unbelievable, and here she was not only daring us, but laughing in our faces as well. Peter looked at me, I nodded, he grinned, and together we stood up, walked over to our sister and looked down at her.
"What?" she smirked up at us.
We smiled down at her, both of us reaching down to grab one of her arms apiece.
"What?" Becky repeated uncertainly as we pulled her to her feet.
"You really shouldn't have dared us Becky." I said quietly.
"Definitely a bad move." Peter added, "Will you do the honours Andy?"
Our sister was baffled by his words, but Peter and I had an almost telepathic understanding at that moment and I knew he was referring to the buttons on our sister's blouse. I nodded to Peter to indicate that I would do the honours; he grinned and changed his grip on Rebecca's arm so that he could move behind her to take the arm I was holding. At first Rebecca didn't realise what I was going to do, but after I had opened the second button on her blouse and was reaching for the third she caught on and tried to pull away.
"Andy no!" she gasped.
Peter held her firmly while I continued to open her buttons and when they were all open I pulled the material out of the waistband of her skirt then pushed the blouse off her shoulder's. As though we had practised it Peter released his grip on one arm just long enough for me to push the blouse down, renewing his grip we repeated the procedure with the other arm. Grinning I pulled the blouse off my sister and tossed it across the room into my chair, reaching around her I opened the clasp of her skirt then the zip, as I pushed the skirt down her legs Rebecca started to struggle in my brother's grip, but it did her no good. With a bit of a struggle I got her skirt off and tossed it into my chair, reaching behind her again, this time I opened the clasp of her bra and despite her protests and struggles I got it off, it too landed in my chair as I stared at her tits.
After a few moments I tore my eyes away from her tits and pushed at her panties, Rebecca's struggles became more frenzied, but despite this I soon had her panties off and thrown across the room. Taking a step back I quickly stripped off my clothes, Rebecca struggled in Peter's grip, but I noticed that her eyes flicked over my body as I took off my clothes. Once I was naked I stood in front of her for a moment, reaching out I tweaked her nipples and she gasped. I'd known as soon as I'd seen her hard nipples that my sister was turned on yet she was still struggling and protesting.
"Christ Andy," she exclaimed, "don't!"
I grinned at her and teased her nipples again, nodding at Peter I prepared myself to grab her arms, with a sudden twist Peter turned our sister around. Quickly I grabbed her arms and pulled her tight to me, my cock sliding into the crack of her bum. Rebecca struggled like crazy, but I held her firmly, at the same time I enjoyed the feel of her body rubbing on mine, especially the sliding of her backside on my hard cock, over her shoulder I watched my brother strip then reach out to fondle her tits. After a few minutes Peter looked at me and nodded, quickly I turned my sister around, Peter grabbed her arms again and pulled her tightly to him, I moved close to Rebecca, put my hands on either side of her head and held it still.
"Andy..." she started to cry.
I silenced her by pressing my lips to hers, Rebecca surged against me in an effort to get free, but my grip was firm as was my brother's, all she succeeded in doing was rubbing herself on our bodies. Raising my hands to her tits I played with her pliant flesh and teased her hard nipples while increasing the pressure of my lips on hers, releasing one of her boobs I slid my hand down to her pussy and gently stroked it. Becky groaned as I pressed my thumb on her clit, it was the first real sign that she was starting to enjoy what I was doing. Parting our lips I leant back and looked at her face, I smiled as I saw her eyes were closed, her lips curved in a small smile of enjoyment. Her eyes opened and looked into mine I saw desire there, but there was also something else, uncertainty, but even as I watched the uncertainty faded as my fingers excited her pussy and tits.
"Andy," Becky said in a low voice, "please don't."
"Too late Becky." Peter said over her shoulder, "You know that we don't back out of a dare."
She tried to struggle again so I speared two fingers into her pussy, my thumb still pressing on her clit as I thrust my fingers in and out of her tight, wet pussy. After a few minutes Rebecca started to move with my fingers instead of against them, I grinned at Peter, he grinned at me.
"You still want us to stop?" I asked quietly.
"No." she said so low I could barely hear her.
"Pardon?" I grinned at her.
She looked me in the eyes, her excitement increasing as I continued to finger fuck her, her tongue flicking across her lips in a sensual way.
"Don't stop." she said a little louder.
"If we let you go" Peter said, "what will you do?"
Rebecca was silent for a moment, but the longer she delayed in answering the more my busy hands aroused her.
"Whatever you and Andy want." she eventually breathed as she pushed down on my fingers.
To be honest I was a little surprised at her reply, it struck me that she could be just saying what she thought we wanted to hear and as soon as we let her arms go she'd be off.
"Anything?" I asked thrusting my fingers into her pussy.
"Anything." she breathed pushing down to meet my fingers.
There was a way to test whether she meant what she said.
"Peter is going to release one of your arms," I said, "when he does I want you to do to your pussy what I have been doing."
"Yes Andy." she replied.
I looked at Peter, he grinned and released one of her arms as I moved my hand from my sister's pussy and without hesitation Rebecca thrust her fingers into her pussy, finger fucking herself harder and faster than I had been. Peter grinned at me and released her other arm, our grins became beaming smiles as she carried on fingering her pussy until with a gasp and a violent shudder our sister suddenly climaxed. My brother came to stand beside me as Rebecca continued to thrust her fingers into her pussy.
"Suck our cocks," he instructed her, "me first then Andy and keep on wanking yourself."
Again there was no hesitation as she dropped to her knees in front of Peter, leant forward and sucked his hard cock into her mouth. Fascinated and aroused I watched her head moving as her mouth slid up and down on his cock, her fingers moving in her pussy in time to the movement of her head, my brother sighed and put his hands to the back of Becky's head. It wasn't long before Peter's sighs became groans and then a cry of sheer pleasure as he thrust into Rebecca's mouth, held her head still with his hands and filled her mouth with his hot seed which she swallowed as fast as it flowed. Then it was my turn, my sister came to kneel in front of me and leant forward to take me in her mouth.
"Lick me first." I said.
Her tongue flicked out to slide over my skin; it was heavenly feeling her tongue lick every inch of my hard cock before her mouth closed around it. As with my brother, Rebecca bobbed her head and I savoured to the full the feel of her lips sliding on my shaft and her tongue pressing against the underside of my cock, placing my hands on either side of her head I guided her movements, slowing her so that my pleasure would last. As the minutes passed I felt the extreme joy of my sisters mouth raising me nearer and nearer to a climax, then, with a groan around my cock, Rebecca brought herself to another climax, her lips clamping around my cock, her tongue pushing against my flesh as she sucked hard. With a cry I experienced the wave of hot sensations of my seed shooting up my shaft to erupt into her mouth, greedily she sucked for more and in doing so succeeded in keeping me hard. Shuddering my sister released my cock and looked up at me, in her eyes I saw lust and desire and shame, it dawned on me that I should be feeling some sort of guilt myself, after all she was my sister and this was incest, all I felt was a deep desire for her body.
"Do you remember the video?" I asked.
"Yes Andy." she gasped as her moving fingers kept her on the boil.
"Remember the scene with the girl getting it in the pussy and the arse at the same time?" I went on.
"Yes Andy." she replied, her eyes widening in a mix of excitement and horror.
"We want to do that to you." I grinned.
"Twice." Peter added, "Once with me in your arse, once with Andy there."
"I...Yes Andy, yes Peter." She submitted.
To my surprise Peter had grabbed a tube of lubricant while I had been enjoying the pleasure of my sister sucking my cock, with a grin of sheer anticipation he squeezed some of the gel onto his cock, lay down on the floor and looked at Rebecca. I saw her hesitate before she rose, straddled him with her front facing his feet then lowered herself towards Peter's cock, slowly she pushed herself down on him, her eyes closing in shame and pain as she cried out, then he was in her arse. Rebecca lay back on my brother at his command, her eyes filled with tears as I mounted her, slowly I pushed my cock into her pussy and gasped at the feel of my brother's cock mere skin widths away. Peter began to move his cock, counter matching his movements I thrust into my sister's pussy as he pulled back in her arse and pulled back as thrust in. Before long Becky climaxed, her pussy grasping my erection as she gasped and sobbed with pleasure, minutes later she was climaxing again, this time her voice rising to a cry.
Suddenly I felt Peter's cock surge into her and twitch, Rebecca cried out, her pussy clenching around me and the mix of sensations overwhelmed me, with a last deep thrust I once again felt the hot surge of my climax as I filled her pussy with my seed. Seconds later Peter and I were thrusting into her again, our strokes hard and fast as we tried to force our cocks to stay hard, which they did. Quickly we pulled our cocks from our sister's shuddering body, swapped positions and pulled Rebecca over onto my erection, as my cock surged into her back passage she screamed. Then I felt my brother's cock slide into her pussy and once again I experienced the bliss of fucking my sister, her arse was tighter than her pussy and the pressure on my cock, plus the rubbing of my brother's cock sent thrills through me that grew with every passing moment. This time it took both of us longer to reach a climax, the same was not true for Rebecca, and within seconds of our first thrust she was climaxing and continued to climax throughout.
Eventually I felt the hot surge of my seed rising and I thrust into her arse as deep as I could and as my seed exploded into her I felt my brother thrust his cock deep into her pussy, his hardness twitching as he filled her pussy. For a few brief, blissful moments my brother and I lay still, our sister speared between us, then with a gasp Peter rolled off Rebecca's shuddering body to lie gasping on the floor. Gently I rolled my sister the other way, a weak sob coming from her as my cock slid from her arse, breathing deeply I sat up and gazed at her naked body.
Ten minutes later Rebecca sat up, beside me Peter stirred and looked up at her, I tore my eyes from her body and gazed into her eyes, the shame I saw there made me feel guilty for the first time, but Peter felt no shame at all as his first words proved.
"Damn," he grinned, "you are a good lay Rebecca. I'm knackered. I'm off to bed, see you in the morning. Before I go though, suck me off again."
He stood up and moved in front of Becky; leaning forward she took his cock in her mouth and proceeded to suck him until he at last filled her mouth with his juices. With that he walked out of the room leaving me alone with my suddenly crying sister.
"Becky..." I started.
I was lost for words, what was there I could say to comfort her after we had forced her to submit to our desires.
"Becky," I tried again and took her hand in mine, "I'm sorry."
She looked at me, half smiled, then her smile widened, and despite the shame I could still see in her eyes I also saw satisfaction and contentment.
"Andy," she sighed, "you and your brother are bastards, more so Peter, at least you seem to give a damn."
"I..." I began to say.
"It's alright," she grinned, "I forgive you, but not Peter. You know what you did was wrong don't you?"
I nodded and tried to look down in shame, but her eyes held me.
"Apart from incest," she continued, "you virtually raped me."
I felt even worse as she said aloud what I had been thinking, I wondered if she was going to tell our parents. The scene that would cause didn't bear thinking about.
"Andy," she said softly, "what made you do it? I can understand Peter, he's an inconsiderate sod at the best of times, I'm only surprised he didn't try it before now, but you...?"
"I wish I knew." I sighed, "It seemed like a fun idea and I knew Peter was thinking the same thing. I really am sorry Becky."
"A bit late after the event." she sighed, "Anyway, it's happened, there's nothing we can do about it now. Only..."
"Only what?" I asked curiously.
"I discovered something about myself tonight," she replied after a deep breath, "something I'm not sure I like."
"What?" I asked quietly.
"I enjoyed having you fuck me." She breathed, "Peter was alright, but it was you that made me submit. Jesus Andy, I've found out that I would do anything you wanted. Do you understand what I'm saying?"
"Yes." I breathed in disbelief.
"That's why I feel so ashamed," she sighed, "I could forget the rest, but this feeling of...well this feeling makes me feel dirty, like a whore, your whore!"
"You could never be dirty." I said, "Not in a million years. And if you are anything it's not a whore."
"Thank you for that Andy." she smiled, "Only it doesn't help much. I feel the need for you like a junkie needs drugs and I know that if I am to have you I must also have Peter otherwise he would tell mum and dad."
"But if I don't touch you..." I started to say.
"It's too late," she sighed then grinned, "I'm hooked on you and I will do anything to feel your hard cock inside me again."
To be honest I felt pretty much the same, but the idea of her allowing Peter to fuck her just to keep him quiet didn't sit too well with me. In my mind I went over the alternatives, every one seemed come out with the same conclusion, Peter would have to be able to fuck Becky. Even so, it seemed to me that we could minimise the amount of use he had of her body with a little care and perhaps I would find some way to make him back off entirely. By now there was no doubt in my mind that I would go on fucking my sister, the thought of it had made me hard again and as soon as she had seen my erection Becky had reached out to take my cock in her hand.
"Please fuck me Andy." Becky sighed.
"In a minute Becky." I grinned at her eagerness, "We need to work out the future."
"There is no working out to do," she grinned as she wanked me, "whenever you want me just take me. If we are in company give me a signal, I'll come running, if we're alone or with just Peter just do it. God I've had a horrible thought, Peter will have that gang of mates round here to fuck me!"
"He bloody won't." I said with a grin, "I've just worked out how to get him off our backs."
With that I pushed Rebecca onto her back and mounted her, as I thrust down into her my sister pushed her body up to greet me.
The next day I sorted out Peter, he had a guilty secret, which I had found out, he had been fucking the Scoutmaster, with bad grace he agreed to leave Becky alone and to keep his mouth shut. Later that same day I walked into Becky's bedroom, grinned at her, told her the good news and instructed her to strip, with glee she did as I said and I fucked her for the rest of the afternoon.
Strange though it may seem, our parents never noticed what was going on, I even finger fucked my sister a couple of times while they were in the same room; the first time was in the kitchen as we sat around the table eating, but the most exciting time was one night in the living room while our parents were glued to a film on the telly. I'm currently trying to figure out a way of fucking Becky while our parents are in the same room, wish us luck.