I was sitting in class and desperately prayed that no one would notice my dick. Why? Because it was ten inch. Flaccid. And you don't want to know what tower I could erect if I got aroused. To fully understand the problem I have to explain a few things: I didn't have this monster dick all my life, actually I just got it yesterday. It is difficult to explain, but my sister has this power, that somehow allows her to change reality, or bodies to be more specific. I don't know how she can do it, and she wouldn't tell me, but she can do about everything imaginable to anyone's body and mind, I experienced that first hand. One day she came into my room and for some reason told me about it. Of course I didn't believe her at first, but when she suddenly snapped her fingers and I saw her tits grow on her chest just like that to the size of her head I was convinced. I also had a boner at that point, naturally. She hadn't seen my dick naked it up to that point, but she knew I was kinda insecure about my size, because I was only 5 inches erect. She had offered me to make my dick any size I wanted to, but she wanted to see it grow, that was her only condition. I was really ashamed at that point, but seeing those gigantic tits wobble in front of my eyes was very convincing, so I dropped my pants, freed my raging boner from my shorts and sat there showing it to her.
"What size do you want to be?" she had asked me. Like you go shopping for a new dick.
"Ten inches." I had responded. I have no idea where that size came from at this point, it was just in my head. Probably I read too much about porn stars having this size, so I wanted to have one as well and never be called the small guy again. She grinned, snapped her fingers again, and the next thing I knew my dick started growing in my lap.
It was the craziest experience of my life up to that point in time to feel my dick expand just like that for no visible reason. And it stopped exactly at ten inches as she had promised. I was so baffled at that moment that I started touching myself without even thinking about that my sister was still watching, but suddenly having a boner this size... it had frozen my brain. "Can I keep it?" I had asked her. It sounded so silly, but she just grinned and nodded her head. And then she told me the one thing that not only changed my entire life, but also brought me to my current dilemma: she told me she would change everything about me that I want to, the only condition was that she wanted to watch. It was kind of like a deal with the devil, but who could have said no to such an offer? I think I masturbated the rest of the day, that new size had made me so horny. My sister had watched the first few orgasms, but then eventually left. I had a few more once she was gone, because every time I looked at my incredible new manhood I grew another erection. From that day on everything changed. No matter how crazy the idea was, she made it happen and watched. I had dicks of all sizes, I masturbated with a cock the size of a tree-trunk between my legs, I fingered my very own pussy and worked my very own tits, I became the most handsome hunk and the sexiest girl, and every time afterwards she changed me back. It eventually became a habit that every time I wanted to masturbate I would walk up to her room and ask her for a change, till I eventually started to just masturbate in her room, because it was easier than to move whatever she had done to me back to my room or the bathroom. She did change all kind of things about herself as well. I masturbated to her having tits the size of a car, or her being all kinds of porn-stars I ever wanted to see naked, and many other things. And then, at one day, we had tried so many things, that I asked her if this tool could also change my mind. And it could.
Most people have no idea how erotic it is if someone just has to say a single word and you instantly have an orgasm beyond anything that any girl could make you feel. Or you'd grow a boner on command. She actually did not remove that, because she found it too funny to watch me grow a boner just like that, which lead to a few complications, because my sister also likes to tease me a lot. Or you suddenly believe that you always had been a girl, or that your sister is actually your lover and you fuck her believing that she is the girl-friend of your dreams. That happened only once by the way, but you get the point: we no longer had any secrets between us and no inhibitions. It if was sexy, we tried it. And then, yesterday after I asked her to give me my ten-inch-size - we had started to develop code-words, and that was what made my dick ten inch flaccid - and she made it happen, but for some reason didn't want to watch me masturbating, just the growth. So I moved my tower of a cock over to the bathroom and did it there. But when I returned my sister was gone and I stood there with my now flaccid monster-cock and no way to return it back to normal again. At that point I was sure she was teasing me again, so I just walked back to my room and did the usual gaming I do when I am bored, just that I had some issues keeping all that new flesh in my pants. Lucky for me she only grew my balls by fifty percent, so I could actually wear pants. We had some other sizes that would have made things a lot more complicated. I got a little worried when she still wasn't back when I had to go to sleep, but I figured she could just fix it the next morning. Sleeping with a dick that size felt odd, especially when you wake up with your sheets hovering several inches over your head because of your morning wood. But this morning my sister still wasn't back, which forced me to go through my morning routine with a schlong of ridiculous size. My mom told me during breakfast that Ellie - that is my sister by the way - went to a sleep-over to her best friend Jessica. I had hoped that she would at least show up at school and that she could fix me there, but so far I haven't seen her, nor Jessica, and I am really starting to get worried.
I managed to get through the day so far wearing my widest baggy pants and avoiding any form of sexual stimulation possible. A caught a few people staring at my crotch, and probably there is probably now a rumor about me stuffing socks into my pants, but I had little choice in that matter. I counted the seconds till the bell rung one last time, then rushed back home as fast as I could. My parents wouldn't be home for a few more hours, which should give me enough time to cum at least once and then get my dick fixed. Having a huge cock is one of my fetishes if you haven't noticed by now, and I imagined not only once to walk around with a giant boner in school, which made it even more difficult to keep it down. The very second I closed the front door behind me I finally could relax, and my dick immediately started bulging my pants in response. I had just lived through one of my erotic fantasies without growing a boner, yet.
"Ellie?!" I yelled through the house, but there was no answer. Erecting half a tent in my pants I walked upstairs and looked into her room. There was nothing out of the ordinary, but also no sister, just the faint noise of her computer's fan, but she usually kept that running all day long anyways. I tried to call her, but it just said that her phone wasn't on. I really started to get worried now, because this was far beyond any prank she had ever played on me. And she did play pranks on me beyond anything even the craziest man could imagine. One time she made my balls fill up every time someone said 'good morning' to me, and I masturbated in the boys room at least twenty times. That other day she forced me to walk through the day with a seriously sensitive pussy, and I literally had to stuff socks into my pants so people wouldn't get suspicious. But every time she was around and enjoyed me suffering, never even once she had left me alone like this. I decided to call her best friend.
"Hey Jessica, this is Marv, how are you?"
"Fine..." she sounded nervous "Uh is Ellie with you?" She asked be and caught me by surprise.
"I was told she is with you? I was worried that neither of you showed up at school." I suddenly felt something creeping up my spine. A thought that was so terrible that I had to force it away to not make me scream in panic.
"No she isn't." Jessica confirmed "We talked yesterday over the phone, but that was the last time we spoke."
"And why haven't you been to school today?" I suddenly had a very odd theory.
"I uh... I have the flue." she said. And then it clicked in my mind: my sister didn't just share her powers with just me. Of course she also shared it with her best friend.
"Did she uh... offer you to make any modifications?" It sounded so odd to ask something like that.
"M-modifications?!" Jessica stammered, and I immediately knew that she did.
"Modifications to your body. Did she do anything to you?" I asked her bluntly. There was a moment of silence.
"Yes." Jessica almost whispered "Did she... change you as well?"
"Yes." I looked down at my massive boner threatening to rip my pants apart "Can you come over? I think something happened to her and we need to figure out what it is so we can fix... whatever she did to you." It was the logical conclusion for me, and I also knew that Jessica had a car, which would make things a lot easier. I probably would have to show her my titanic dick, but there were worse things a man could do.
"I... can try." she mumbled.
"Ok, then I see you in a few." I responded and hung up. I had to, because my boner was throbbing at full attention in front of my face, and with her coming over I would have just like ten minutes to to get rid of it. I managed to do it in five.
"Hey!" I greeted her, wearing my baggy pants again. She looked nervous but otherwise quiet normal, except for the blanket she was holding tightly in front of her.
"Can I come in please?" her voice was shaking, and I let her in. She eyed my crotch on the way in and I was pretty sure that she saw my bulge, but that didn't matter anymore. She knew it and if she did similar things with my sister that I did with her, she could probably imagine the rest. We immediately walked up to Ellie's room, which was still empty, surprisingly. Jessica sat down on her bed like she always did, but she looked seriously worried. And then she dropped her blanket and I knew what modification she had done to her.
"Could you please stop staring?!" she asked me and threw me out of my daze. I got lucky that I had just emptied my balls, otherwise I would have pointed a cock the size of a baseball-bat towards her. Those tits on her chest were at least the size of basket-balls, probably bigger, it was hard to tell under her comfy winter pullover.
"Sorry... I... got distracted." I excused myself, but my grin was probably obvious.
"I was in the mood for big yesterday." she explained herself "And as far as I can tell you had a similar mood." She got me red-handed, so to say.
"I... might have..." I frowned. There was no need to lie, she could just see my dick bulge my pants again after I thought about her boobs for a second too long. "Yes, I asked for a huge cock, that kinds turns me on." I confessed.
"Yeah..." was her only response and then she tried to adjust her bra, which only caused her tits to wobble like crazy. "I put on my biggest bra and hoped it would do anything, but it's just hopeless." she said desperately. her hands vanished under her pullover and a few seconds later appeared with a bra that was made for a C-cup at best. She saw me staring again, but obviously decided that it was pointless to try to hide her rack anymore. It was just too big to be hidden anyways.
Mon May 07 18:01:52 2018