Note: This story was dynamically reformatted for online reading convenience. Treehouse When I was 10 years old, my dad built me a tree house. It was something very special, made of sturdy wood and properly roofed over. There were real windows and he helped me fit it with a mattress, chairs, bedclothes and a storage chest. He even fitted some mains lighting and sockets so I could run my little soudn system and DVD player. After he'd made sure it was waterproof, he promised he'd not enter what then became my den. And I don't think he ever did, without me inviting him anyway. I used the tree house at first to play with my friends, who were all boys from the neighborhood. We loved going up there - it was quite high off the ground, and the only way anyone could get in or out was by a rope ladder. I had fixed it so that someone needed a special hooked pole to unlatch the door and allow the rope to fall out. Only I knew where the special pole was, and I made sure my friends weren't looking whenever I retrieved it. Several times, I thought they were looking, so I changed the hiding place. By putting tell-tales on some parts inside the house, I was sure that no-one, in the 5 years that I used it, had ever got in without my knowledge. We were not very adventurous in the early days as there wasn't much to do in our street. I managed to smuggle up and old TV and get it to work, with an old piece of wire as a make-shift aerial. As I didn't watch much TV anyway, it was good enough when we were up there as a group and something was worth watching. I guess at the age of about 11, my hormones started kicking in. I soon learnt that much pleasure was to be gained from playing with what soon became a sizeable piece of meat between my legs - soon to be called my cock. I ejaculated one afternoon for the first time while I was in the treehouse and squealed loudly. Luckily no-one of my family was in the garden at the time and I managed to calm down. I wiped up the watery stuff and then began to giggle. I realised from some of Dad's videos that this was the start of my growing into a man. What I didn't realise at the time was that my cock was already much larger than those of my friends. It also gushed out considerably more stuff than theirs. I was soon masturbating several times a day, and not only in the tree house. I'm sure my bedroom soon smelt horribly of that stuff, but neither my parents nor my sister ever mentioned noticing the smell. I used to pile the cloths and underpants that I soiled into the bottom of the washing basket, covering them with other clothes. It was then that I discovered the awesome smell of my sister's used panties. Not only did they smell quite a bit, but the smell created an instant erection of my cock. I began to smuggle several of her used panties into my treehouse. I would hold them close to my nose ans sniff the aroma - my cock would harden really quickly. Then I could easily stroke it until it spurted. I also used to wrap her panties around my hard shaft and use the soft material to massage my cock. I found that her silk panties were the best, but I had to use a lot of my pocket money to buy her replacements, so that she didn't miss them. After a while, I had about 10 of her panties, which I used then put into the washing basket, taking her freshly used ones in return. As I was about to turn 12, I was cumming many times a day and feeling like a real stud - just like one of the guys in the porn films that I'd 'borrowed' from Dad. I guess I'd learnt all there was to know about sex by then, although I'd never had any contact with a girl. Well, apart from my sister that is - but then I didn't really consider her a girl, did I? She was 3 years older than me, had lots of girlfriends and looked on me as her little slave, always getting me to get things for her, especially at the weekends. Little did she know that I was using her soiled panties for my own pleasure! One day, my parents were out shopping in town. It was a Saturday and my sister would be out playing netball, or whatever sport she played with her girlfriends. As soon as my folks had gone out, I sneaked into Dad's study and opened the cabinet in which he kept his porn videos. I'd managed to find a way to unlock the cabinet without him knowing. I chose the naughtiest video I knew he had, one I'd not watched before, but I knew from the cover it involved young girls and boys, just like me. I also knew it was one of Dad's favorite ones, as one of the girls on the cover looked just like my sister. I clambered up into my treehouse and put the disc in the player. I'd already worked out how to get the picture to work on the bigger screen TV. As the movie began, I slipped off my shorts and underpants, my already hard cock sticking out as usual. It felt good as soon as I began to play with it. I'd put a couple of my sister's panties beside the mattress and soon picked up one of them, a pretty pink silk pair and wrapped it round my cock. I groaned noisily, enjoying the delicious feel around my throbbing shaft. From the feelings I was already getting, it wouldn't be long before I shot out my first load for the day. Then I heard a creaking sound. Oh, damn, I thought immediately, I've forgotten to pull up the rope ladder after I got into the treehouse. There was nothing I could do now, except to cover up and wait for whoever it was. I expected it to be Jason from next door, who'd seen me get up here. I just managed to cover my cock with a blanket when a blonde head appeared in the hatchway. Now all of my friends have brown or black hair. OMG, I thought it's my sister! And it was. Sarah poked her head up and grinned at me. "So, little bro. I've caught you at it, have I?" she giggled, with a big smile. "I watched you go into Dad's study and come out with a DVD. I bet it's a porn one?" I nodded slowly, blushing. "It's OK, bro. I do the same. He's got some videos that really turn me on!" she grinned. "So...what do you do? You're a bit young to be cumming, aren't you? None of the young boys at my school can even get hard by the time they're 14!" "I can," I blurted out, then wished I'd kept my mouth shut. "Can you, now?" Sarah asked, her smile changing from one of amusement to one of interest. "I'd guess you'd better show me..." I hesitated. "Or I'll tell on you!" she continued. "Mum and dad would love to know that their innocent little boy has been wacking off using my panties and stealing Dad's videos, wouldn't they?" "You know?" I said, defeated. "Of course I know," she replied. "Why wouldn't I? But it's nice that you've bought me some new ones too. You have good taste." "They're the best ones," I couldn't stop myself saying. She giggled. "You know I purposely leave my panties for you when I've been very horny. I know you can smell them. I like that and it gets me hot to know you've been enjoying yourself with them." "You do? Oh, I have," I grinned, almost throwing the blanket off so she could see... By now, she had finally pulled herself up through the hatchway and now she sat on the chair across from the bed. It wasn't a big treehouse, so she was sitting only a short distance from me. She was wearing a very short skirt, just like she usually does and as she sat down, there was no way she could hide the fact that she was wearing pink panties. I got a huge eyeful and my cock, which had partially retracted when I saw her coming up, now re-erected quite violently. I guess it was the closest I'd ever been to a girl, and in those sort of clothes. "So...." she began again. "Do I get to see it?" "What?" I asked, bemused. "You know. That thing you wack off, jerk off, whatever it is you do," she giggled. "I guess so," I replied slowly. "You promise not to tell Mum or Dad?" "Now why would I do that, little bro?" she smiled. "Perhaps you and I..." She stopped as I'd pushed the blanket off my waist so my big cock stcuk up in the air. "Oh my!" she cried, "I've never seen anything like it! It's absolutely huge - especially for such a young guy!" "Is it?" I asked, innocently. "I've only seen those of the guys in the videos and they're all freaks anyway." "Oh, no. That is awesome," she giggled. "I've really not seen one so...big and imposing!" She got out of the chair and came to sit beside me on the mattress. "Have you done it yet today?" she asked quickly, her hand reaching out and touching the throbbing shaft of my cock. "Nope," I replied, "But I was just about to!" "Will you do it for me?" she asked, smiling sexily. "You want to watch me do it?" "Sure I do. I love watching cocks spurt their stuff. It's even nicer if I make them do it!" she added suddenly. "You do that to guys?" I asked, astonished. "Oh yes, as often as I can. I've even done it to Dad a couple of times!" she grinned. "To Dad?" I said astounded. "Yea, sure. Why not? He's male and he was horny so I did it for him when Mum was away. Just twice or there times, I think. Not sure now. It was a while back." "But you're only 15 now!" I cried. "Yea, I think it was after my 14th birthday - just!" Sarah giggled. "Have you...you know..done anything else?" I asked, timidly. "You mean had real sex?" I nodded. "Nope. Not yet. Not with anyone. I've given hand jobs - that's wacking off, to you, and sucked a few guys until they've cum, but that's all." "You suck cock? Isn't that just for movies?" "I like doing it, actually," she admitted. "I like the taste of man cum, as they call it. My girlfriends think it's disgusting but, hey, who are they?" By now, Sarah had progressed from just touching my erect cock, to positively trying to fit her hand around it. "It's so big!" she cried. "I just can't believe that my little innocent brother has such a delicious weapon. Now how does this feel?" She wrapped both hands gently round my throbbing cock and began to work them slowly up and down, tenderly massaging the shaft. I groaned with the pleasure. It felt so much better than my hand, or even her used panties. "Can you smell me now?" she asked openly. "I'm really hot now!" I could smell that familiar aroma. I was getting my own sister horny! WOW! continued in part 2 [comments and suggestions to rockyhard4uc@gmail.com. I often chat on gmail and yahoo (note: as rockhard4uc) - pls join me .] being continued...Treehouse - part 1