Nothing seemed to be going right for me. At twenty years old I was still stuck at home with my parents and sister. My girlfriend for some unknown reason was being a bitch and an absolute pain, and then there was a likelihood of losing my job as the company I worked for was downsizing and my supervisor had a downer on me. Then to top it all my mother wanted me to go to Spain with my sister and her mates as chaperone. At eighteen nearly nineteen I didn't think she needed a chaperone, but to keep the peace I relented and agreed to go. Perhaps a few bits of Spanish totty might cheer me up.

I knew there was something fishy about this holiday when about a week beforehand I heard my sister talking about the holiday with her boyfriend. I didn't catch all of it but it sounded like he was in Spain the same weeks. Then things went from bad to worse. In scratching around for my passport in my parents desk I discovered that I wasn't their son. I was adopted! You'd have thought at twenty they would have told me. I always knew there was something different with me. My parents and sister were all around five and a half feet tall, yet I was six feet one and towered above them. My mother always said it was all the carrots she fed me on. I was very angry not knowing what to do or say, so I bottled it up and took it on holiday with me.

The trip out was unremarkable and the onward trip was hot and dusty in a rattly old coach. The villa was good and had six bedrooms, which meant we all had a bedroom each. Having got settled I walked into town to collect the hire car I had booked. It was meant to be a three minute walk to town and another two to the beach. It was nearer to fifteen and five. The car was tatty but ok and I returned to the villa knowing we needed to get some provisions in.

On my return not only were the girls in the swimming pool but also the girls boyfriends. They were in a villa about five miles away and had come over. Already most of the girls were topless and that included my so called sister, Paula. I reminded her we needed some food and drink. She went to get changed as did Andrea.

We had a shared fund and with it we bought the foods and drinks needed and then they started on alcohol. This was going to be one boozy holiday from what they put in the trolley. Back at the villa one of the lads was fucking Hillary (Hilly) by the pool. I pulled them apart and told them to get a room. The other girls and lads thought it funny.

To cut a story short the girls spent virtually all day around the pool naked or pretty close to it and the boys spent more time in the girls beds than they did at their own villa. The night life was really wild and I observed several of the girls getting shagged and not by their boy friends and Paula was no exception to that getting spit roasted just outside one of the clubs. I met a Dutch girl and spent most of my time with her, including sleeping with her. At least we made love in my bedroom.

I had to part several of the girls and lads fucking in communal areas as well as the pool. My anger with my sister and her behavior was compounded by my anger at my so called parents. The boyfriends had come out on a different flight to us and had to return two days earlier. The girls behaviors went into overdrive and not in a good way. On trying to round them up to walk back to the villa when the clubs shut, I had to pull lads off several of the girls. The one missing was my sister.

I found her behind the club on her hands and knees moving between the three cocks she was sucking while another older man was behind her slamming her pussy really hard. I pushed him off her and the man took a swing at me. I dodged it and gave him a good punch to let him know he had swung at the wrong man. The other three decided not to see what their fetes might be and took off. Paula was annoyed that I had spoilt her fun. My anger just grew a level higher.

The final evening I was surprised that none of the girls were rushing to go out. I had other things to do. I need to drop my Dutch friend off and return the hire car. It was still hot as I walked back to the villa. I could hear music from a long long way away. On arrival there were bodies everywhere. There was probably three times as many lads and men than the five girls. Not one was dressed. It was a full blown orgy. There wasn't a free mouth or pussy anywhere. My anger was at boiling point.

I turned the music off and a few of the lads and men got the message and drifted away before I chucked them out. I then started to physically yank men and lads off the girls one at a time and throw them out. One by one the girls were free of men and lads. None of them seemed that happy that I had ejected all the men. I went to my room and within minutes my sister came to my room, still totally naked, complaining about my actions.

I lost it and yanked her across my lap and started to slap her arse for her. She was yelping and threatening to tell our parents, not that she could. Imagine the conversation. "Mummy dear I was getting a serious shagging by three men when my brother poked his nose in and pulled them off me, and then he slapped my bare arse for me." It wasn't going to happen. What was happening was that I had got an erection while slapping her arse. I landed several more blows on her arse. "So you want fucking do you," I yelled at her as the blows landed. "I'll teach you about fucking, " I told her as I rolled her off my lap and threw her across my bed. Her arse was in the air.

She did have a nice arse and my erection took over as I yanked my trousers down and slammed my cock into her already wet and opened pussy. Paula yelped and looked around, "You can't do this your my brother. You can't fuck me." In my rage I told her that I wasn't her brother and continued slamming her pussy as hard as I could. At first Paula was fighting against me, but the longer and harder I fucked her the less she struggled and the more she started to moan and groan at her treatment of her pussy. She was now enjoying it.

I lent forward and grasped her tits. They weren't a bad size and her treatment had her nipples hard and erect. I slipped a hand underneath her and started to stroke her pussy concentrating on her clitoris. Paula was shaking and groaning and now telling me not to stop. Then she was wildly thrashing around. I guess she had come, but I hadn't so I continued to slam into her until I came deep inside of her pussy. As I grunted and came in her, a cheer went up and I looked around to see Paula's four mates stood in the doorway watching me fucking and coming in what everyone thought was my sister.

After they had gone and Paula had recovered from her fucking she wanted to know what I meant that I wasn't her brother. I told her about my adoption papers. Paula informed me that she was also adopted and found out a year or so back. Unlike me she wasn't angry, she had just been grateful that they had brought us up in a nice loving environment. I hadn't thought about it that way.

We ended up cuddling each other. It felt strange that I was cuddling a naked Paula while my limp cock was still dangled free. We hugged and kissed, more like brotherly kisses, then Paula went to her room. The house was now quiet and I assumed that all the girls were in bed.

I was dozing when I heard my door open and saw a figure slip into my room and shut the door. It was too dark to tell who it was. It was quite a hot body that slipped into bed with me and a hand reached out and took hold of my cock. Until she whispered to me I had no idea who was stroking my quickly stiffening cock. It was Hilly who whispered that it was some fucking I had given my sister and that she wanted some of that.

Before I could say anything she was under the covers sucking my cock, making sure that it obtained it's full length and stiffness. As soon as she was happy with her efforts she crawled up my body and impaled herself on my cock. I could hear Hilly stifling her moans as she rose and fell and I thrust up to fill her as deep as I could. She didn't last long before she was shaking and moaning a bit louder. I joined her in her point of maximum pleasure and pumped what cum I had into her pussy. She almost immediately collapsed onto my chest.

It was a good five minutes before she whispered that it was great. She gave me a tongue twisting kiss before pulling herself off my rapidly softening cock. She slipped out of my bed and as quickly as she had entered my room she left it and returned to her own room.

Next morning while Paula organized the girls for the trip home I decided to go for a final walk. Olga was already packed and offered to join me . I really didn't need her to, but after my bad behavior the night before, I couldn't say no. I explained explained to her that I was adopted and I hadn't fucked my biological sister. We started the walk back to the villa. We were making good time until Olga dragged me behind some bushes where she was quick in taking my cock out and sucking it.

Olga was the oldest of all the girls and probably the sexiest one. My cock was testament to that in that it was hard very quickly. As soon as I was hard, Olga stood and turned around and bent over. It didn't totally shock me that she wasn't wearing any panties. We both knew what she wanted and I made sure she got it. It was a pretty quick shag, but most enjoyable. I was gripping her hips and pulling her backwards as I slammed forward penetrating her fully and as deep as I could get. Olga was a noisy lover and gasped, moaned and groaned between telling me not to stop. As if I had any intentions of stopping. I gave my best performance and gave a final shove causing Olga's legs to shake and almost give way as she came and I left my baby batter deep in her pussy.

During the remainder of the walk back I had to loan her a handkerchief several times, to wipe the juices leaking from her pussy. We arrived back with a little over and hour before the transport to the airport was due. All five girls were sat waiting and looking at me. I decided to apologize for my behavior and to explain why it had happened. They all sat quiet as I told them that I was adopted and not Paula's biological sibling and that I had learnt this just before I came away with them. I was angry and wrong with what I did, and what they did was none of my business, other than I was tasked with chaperoning Paula. Between her bad behavior and my anger I had snapped. I again apologized. All of them including Paula said it was ok, and part of my anger was their own faults encouraging the lads and men. They even asked that I didn't tell their boyfriends. I told them it wasn't my business to tell them.

Back home I had it out with my parents that I knew I was adopted. They told me that they weren't able to have kids so they adopted both myself and Paula. They said they had wanted to tell me but it never felt like the right time. Within a few weeks of getting home Paula dumped her boyfriend and my girlfriend dumped me. Paula would slip into my room and make love to me when it was safe to do so. I didn't lose my job but got moved to our other plant. It was a small promotion. The traveling was a pain and I soon found a flat and moved out. Our parents helped me paint and furnish the flat.

Paula would occasionally visit and stop over until she discovered that Olga was in the throws of moving in with me. This all happened a little over eight years ago. Olga and I now have plans to get married. Paula has told me that she would have liked it to be her, had we not lived for so long believing we were brother and sister. As much as I love my sister I am very happy with Olga.