Tuesday

"I... It's not what it looks like."

That was my standard answer whenever I was caught with pornography. I know it's dumb and isn't going to fool anyone, but my mind goes blank and it just slips out.

"Really?" said my sister Lori. "Because It looks like you're watching porn Jacob."

"Well, umm." I blushed crimson as I fumbled to close the video player on my computer screen.

"Mum says dinner is ready." she said, before leaving. A moment later she peeked her head back into the door frame. "Hey, you think I could borrow some of that?"

"What?" I asked, confused for a moment. Was she talking about porn?

"You know, pornography. I've never watched it before. Feel like I'm missing out."

I felt a little panicked being asked about something like that by my older sister, or half-sister at any rate. You see, I'm not very good with women. Or people for that matter. I suffer from social anxiety. I reflexively had to take the heat off myself.

"Um, Dad has some in his closet if you want." My ears felt like they were going to burn off.

"David watches porn?" she seemed fascinated. "Hmm, well thanks."

She finally left and I breathed easy once more. I needed to get a damn lock on my door. Or just stop watching nudie films when people were around. It was a bit of a problem of mine, I had a lot of sexual energy and no way to release it.

Dinner in the Jansen household was a family affair. Even though we were all adults now, Mum insisted that as long as we lived under her roof we would all eat together and discuss our day. So my sisters Hanna, Lori and I basically had to take turns telling our parents what we got up to. Hanna was banging on about some guy she liked and how she wanted to go to some party on the weekend. That was Hanna, the polar opposite of me. Outgoing and a complete party animal.

"And what about you Jacob, how was class?" asked Dad.

"Pretty good."I told him. "We are working on minimising matrices from the render pipeline."

"You're such a nerd!" said Hanna, rolling her eyes at me while she poked at her food.

"Software engineer." Corrected Lori. I was surprised to hear her sticking up for me. I also noticed her shirt was fairly low cut and I could clearly see massive amounts of cleavage between her large breasts as she leaned over her food. I couldn't help but think about her potentially watching pornography as she played with her chest. It was fairly common for her to wear slightly revealing tops, and I never failed to notice how well endowed she was. But after she caught me watching porn, I found it much harder than usual to resist her physical charms.

"Whatever, He knows he's a nerd." said Hanna with a smile on her face.

I didn't take it personally, Hanna and I actually get along fairly well, we just like to goad each other a bit. Although I suppose I do resent the way she treats me like a younger sibling due to my social inexperience, despite being a year older than her.

It was quite a while before I masturbated like that again after that night, I was terrified of being caught. Occasionally I would quickly jerk one off in the bathroom when I knew I couldn't be caught, but my video watching habits in my room were curbed for a while.

Every Tuesday I go to my friend Paul's house after dinner to play World of Warcraft. Tuesday is raid night and rather than play separately from home, I take my laptop over and we make a night of it as his folks are always out on Tuesdays. One particular Tuesday however, about two and a half months after being caught by Lori, the game servers went down unexpectedly so I decided to go home from Paul's early so I could finish some homework. It was rare, but happened occasionally.

I entered through the back gate this particular Tuesday as I normally would, but then something grabbed my eye as I was passing the dinning room window. The curtains were still open and I could see through the dining/kitchen area of our house into the lounge. On the TV was some woman sucking on a guys dick. I stopped in my tracks to take a closer look. I could see Lori on the couch facing away from me, watching the TV. Lori was watching porn, I couldn't believe it. Then I noticed something else, I recognised the images on the screen. It was from "Horny Teen Toads", a blu-ray in my small physical porn collection that I thought I hid very carefully in a disguised box under my bed. Had Lori gone through my stuff and borrowed it? How long had this been going on?

As I stared at Lori watching my porno I began to notice she was moving her arm. It took a moment of confusion before it dawned on me that she was masturbating. Suddenly my jeans tightened as my cock began to grow and my heart raced. I was actually watching my sister masturbate while watching my porn. Of course I couldn't really see anything and wished I had a better view, but my penis didn't care. It strained for released.

I knew everyone else was out. The only ones home on Tuesday nights would be Lori and Dad, and clearly Dad wasn't home this week or Lori wouldn't be watching porn. I looked around the back yard. It was pretty safe here, behind me was the back fence with a hedge in front of it so nobody would be able to see over. The gate I had just came in was pretty high so nobody would be seeing over. I gave in to my lust and unzipped myself, pulling my cock out into the free air.

I started sliding my hand back and forth over my cock shaft as I watched the porn on the TV and Lori masturbating to it. How I wished I could be a fly on the opposite wall.

I pumped my dick through my fingers with greater and greater intensity as I imagined the woman being nailed on the screen was my half sister Lori and I was the one injecting her with cock. Soon I couldn't withstand it any more and grunted softly as I unleashed my spunk into the bushes in front of me. My semen splattered over the leaves and branches as I tried to catch my breath sucking in the invigoratingly cold fresh air.

Once I had recovered I decided I better not go inside, so I zipped myself back up and stealthily retreated through the gate and back to my car. I spent the remainder of the night listening to my iPod in a McDonald's car park while guiltily fantasising about Lori and Hanna until I finally went home at my regular time. Needless to say my homework didn't get done that night.

I spent the next couple of days wondering if there was anything I could do to see Lori in action again. Determining that there might be, I came up with a plan and started to put it into action on Thursday. I had an early class and was home alone for the afternoon. So I found the video camera that I got for my birthday a couple of years earlier and checked its stats. It had plenty of battery life and storage space for recording. I found some duct tape and ripped off a square, placing it over the LED lights on the small handy cam so you couldn't tell if it was recording. Finally I examined the bookcase next to our TV for a suitable position. I placed the camera in open view between some books and a photo frame. Then I decided to place it on it's side to further avoid suspicion as well as obvious detection of the duct tape, I could easily rotate the footage 90 degrees during playback. Now to play the waiting game.

I spend the next few days and the weekend worrying that someone would find my camera's placement strange and start asking questions, but they didn't. Tuesday came and it was still sitting in it's place. When I got home from class on Tuesday I was the first one home, so I checked the camera and turned it on. Then I pressed record and gently placed it back in place. I sat on the couch and looked at it. There was no way to tell it was turned on, excellent. Soon everyone else was home and we had dinner. After dinner I left for Paul's place as usual.

While I hoped to catch something on camera I didn't think it was very likely. It was most likely a one off event for Lori as Dad is usually home on Tuesday nights. I just had to hope Dad would be out again, giving Lori the chance to do her thing.

I got home at 11pm like usual and everyone was in bed except for Hanna whom got home later than me. But that was fine, she'd go straight to bed as I never saw her on a Tuesday night. So I stopped the camera recording and took the memory card into my room. I copied the video onto my PC, erased the card and returned it to the camera, ready to go again if required.

Once I was back in my room I made sure my speakers were turned off and loaded up the video. It took a moment to load as it was a very large file with over 5 hours of recorded footage. Luckily I had splurged on the highest capacity SD card that I could get. When the video loaded I was greeted by a close up of myself adjusting the camera's placement, I then sat on the couch and looked directly at the camera for a while before leaving.

I hit fast forward a couple of times to play the video back at 32x speed. There was a bit of a gap where nothing happened, then people started walking past in super speed. I watched the time stamp rise until 7:30 hit and everyone would have been leaving for their various activities. I watched carefully as Lori and David zipped across the screen a couple of times. Then Lori appeared on the couch so I quickly pressed play to resume playback at regular speed.

For a little while I couldn't tell what she was watching, it could have been the nightly news for all I knew. I didn't have any sound because I didn't want anyone to hear. I considered my headphones but I wanted to hear clearly if anybody approached my room. I was still a little cautious about being caught. Especially watching something like this, I would die if caught watching this.

Soon I got my confirmation. Lori reached into her pyjama pants and started rubbing herself under the fabric. No way, I couldn't believe my eyes. Two weeks in a row? Where was Dad going every Tuesday, he didn't have anything on as far as I knew. My shaft stiffened in my pants very quickly as I watched my sister diddle herself. Then suddenly my questions were answered as Dad walked into frame and sat on the couch across from Lori. Lori immediately stopped playing with herself and disappointment swept over me. I guess she wasn't watching porn after all, just having a diddle while nobody was looking.

I grabbed my headphones and plugged them into my PC just to be sure. I held one ear piece up to my right ear so I could hear. I heard groans. Followed by slapping sounds, then someone yelling "Give it to me, harder, harder!". They were watching pornography! Both of them! No way, I couldn't believe it. My sister was watching porno with our dad. I looked closer and then I noticed the bulge in dad's jeans. He had a hard-on. This was a major discovery.

I watched the remainder of the video and nothing much else happened. Lori didn't resume her masturbating. When they got up and left the couch I turned the video off and went to bed. But my cock was so hard at the thought of Lori watching porn with our father than I had to quickly rub one out so I could relax. I blew my load into a Kleenex before going to sleep. The next morning I quickly edited the video so only the relevant parts remained and compressed it to save space before moving it to my hidden external hard drive that contained all my computer porn videos. I couldn't wait to see if last nights activities continued the next week. As you've probably guessed, they did.

Interacting with my dad and half sister in the mean time was a little strange. I had to try and hide the raging erection tenting my pants whenever I was around Lori and found myself subconsciously avoiding eye contact with both of them. I hoped neither of them noticed.

I started recording before dinner the following Tuesday and collected the video when I got home from Paul's. This week both Lori and Dad started watching porn, but this time Lori continued masturbating. I was amazed, and yet so incredibly turned on that my balls ached. Despite not seeing any real flesh except for a little of Lori's cleavage, I pumped my fist over my cock and got myself off like never before. Seeing my sisters hand down her pants was a major turn on, and having my father right next to her didn't dampen it at all.

This became my new Tuesday routine. I'd come home and watch my sister masturbate while watching porn with my dad. I'd also re-watch it a couple of times during the week in between new videos.

I even started using my headphones as I watched the videos so I could hear what they talked about as well as the sex sounds coming from the TV. It all added to the experience and made for the most intense masturbation sessions ever.

On the fifth week of recordings something changed. A little ways into their porn session, Dad pulled his cock out and started wanking in full view of Lori. I couldn't believe my eyes. Neither could Lori it seems as her eyes almost popped out of her head. In no time at all they were both without pants and jerking off while watching each other. Unbeknown to them I was jacking myself right along side them, although delayed a few hours.

I was completely engrossed in the video, listening to the moaning from the TV in my headphones while watching my dad and half sister masturbate together, that I didn't even hear my door open, exactly what I'd been afraid of before getting so engrossed in the weekly lounge room activities.

"Oh my god!" cried Hanna. I jumped in my seat and felt like my heart was going to give out. I'm prone to anxiety as I'm sure I've mentioned, and although I've only had one full fledged panic attack in my life, this was the closest I've ever come to a second.

I couldn't pull my pants up and stop the video simultaneously, so I chose my own dignity. Possibly the wrong choice at the time. As fast as my hands could move I was stuffing my rapidly shrinking cock back into my underwear and pulling my pants back up. Then I fumbled for the computer mouse to stop the video. Too late, my secret was out.

"Is that Dad and Lori?" asked Hanna. In a much quieter voice that I was thankful for. The last thing I needed was anybody else coming to investigate, especially Dad or Lori.

I could feel that my face was beat red and I couldn't process the words I was trying to say.

"Ahh, I... It's not what it looks like." Dammit, why do I always say the exact same thing?

Hanna was staring at the now blank screen with wide eyes, completely entranced and dumbfounded.

"It's looks like you were jacking off to a video of Lori and Dad doing the same thing..." she said. "Is it true? Do they jack off together?"

I tried to calm myself, collecting my thoughts and taking deep breaths before I responded. "Ny... Yes." Good one Jacob, real smooth.

"Holy crap. That's amazing. Can I watch too?" Hanna whispered.

I was so flustered I couldn't even respond. She decided to reassure me.

"Hey, It's ok. I'll look after ya. I won't tell anyone." she said. That just made me angry. I could look after myself dammit, I didn't need my younger sister to do it for me. "So, how did this come about?" she asked, gesturing to the computer monitor.

I explained everything to her. Well I left out how I masturbated outside and so on, but everything else I told her about. I also begged her not to tell anyone and she agreed.

"Can I watch some with you bro?" she asked after I'd laid out the whole story for her.

A part of me wanted to say yes, but the pounding in my chest wanted me to say no, or more specifically to run away, but that wasn't going to solve anything.

"Ahh, I dunno." Is all I could say.

"Maybe another time. I'll let you think on it." Relief washed over me. "I'll let you finish, or whatever. Hey, you should check out a website called Literotica. It's full of naughty stories."

"Ahh, maybe." I stammered.

"Been nice talking with ya Jacob. Didn't know you were into this kind of stuff. See you tomorrow." she said, then she left me dumbfounded and confused at how well she took the news that our family members were messing around with each other.

Over the next week I focused on calming myself down from my encounter with Hanna. Despite my fears everything was normal at home and it was clear she kept her promise and didn't tell anyone. After a couple of days when I was feeling more at ease about the whole thing, I decided to check out the website Hanna had mentioned. I explored the main pages a bit and scanned through the different genres they had stories on. That's when I came across the Incest/Taboo section. Something about it resonated with me and I just had to click on it. Soon I was scanning through pages and pages of incest stories, getting a raging hard on just from reading the descriptions.

Over the rest of the week I read many stories on the site including "Sister Sucks Sleeping Sibling" by Brodosist which easily became one of my favourite stories. It wasn't long before I was imagining both Lori and Hanna playing the female parts in that story with myself the lucky recipient of said sucking. My lust for my sisters grew steadily and my resistance to it eroded away like a river eating its way into rock. I was obsessed with Literotica and with my sisters.

The following Tuesday arrived in what felt like record time and I started recording as usual, I almost skipped it after being caught the week before, but Literotica had me too worked up to ignore what was happening in my own home. I couldn't concentrate during the raid at Paul's place, all I could think about was Lori and Hanna. I died many times in the game and was punished for my poor performance by the other players by not getting my share of the loot this week.

Finally it was time to go home and collect my video bounty, the only loot I cared about any more. I was anxious to watch it, but also worried about Hanna coming in when she came home. A part of me wanted that to happen, but alas, I waited for her to come home and go to bed before I loaded up the video. Fortunately she didn't do that.

Instead, Hanna came directly to my room and this time knocked on the door.

"Come in." I called.

"Oh good, you're up." she said when she saw me at the computer just browsing Facebook and wasting time. "Did you record another video tonight?"

"Yeah." I replied. I was feeling a lot calmer this time.

Hanna plastered a big grin across her face. "Want to watch it together?"

Every fiber of my being wanted to say yes. But something in me still resisted, sometimes I hated being me. Why couldn't I be as outgoing as others?

"Hey, don't be ashamed of spying on Lori. I'll tell you a secret. I used to spy on Dad a lot. He used to masturbate in the guest shower at night. I'd be on the computer reading stories when he did so I'd hide and then sneak over and watch by cracking the door a little." I have to admit that her admission turned me on a bit and my cock started to grow despite my nervousness.

She continued, "How about if you let me watch the video with you, I'll go topless."

"Bullshit." I said.

"I'm serious." she insisted.

I called her bluff. "Ok, deal."

My younger sister was wearing her basketball uniform, as that was were she had just been, she had basketball training every Tuesday. She is 6 feet tall with shoulder length blonde hair, blue eyes while also slim and athletic. All traits from my fathers side. While I seemed to get most of my traits from our mother. Brown hair and darker hazel eyes, skinny but not athletic or muscular. Although I was still slightly taller than Hanna at 6'1".

I didn't truly expect Hanna to go through with her offer, but before I could back down on calling what I thought was a bluff, Hanna was lifting her number 7 basketball jersey over her head and revealing her bra to me. Me eyes widened involuntarily and I was stunned, remaining completely silent as she reached back and unsnapped her bra. It fell to the floor next to her Jersey, and just like that my sister was topless before me.