I stared at my sister from across the table as our parents chatted away about some random nonsense which had occurred during their day. Something about a guy on a motorbike cutting in front of our mom which had nearly caused her to swerve into a ditch? I think that was it, but I didn't care about that. What I cared about was the thick layers of foundation covering patches of my sister's face and the way she winced with seemingly every slight movement she made. This had been going on for a couple of months now, but I seemed to be the only one who had noticed the obvious signs of abuse.



Only I had seen the purple and blue marks on her arms and legs in the fleeting moments she had them on show. Of course, when I approached her about this I was greeted with nothing but naivety: "I have a low iron supply, so what?" Ellie, my sister had scoffed when I had first brought it up. And mentioning it to our parents did not fare much better: "She's just turned 21, I dare say it's due to a few drunken stumbles on a night out" my dad had laughed, barely even looking up from the TV show he had been watching.



I rolled my eyes at this memory and poked at the chicken on my plate carelessly. The only person who had taken me seriously about this was my best friend, Brooke. We had been friends since pre-school and were due to move into student accommodation together when our first college semester started in September; one month from now. We had both been accepted into the same college in a city around 50 miles away from where we had grown up. Of course, we couldn't wait to begin this new journey, but this issue with Ellie had thrown a dark shadow over everything. The only thing I could think of was that she was seeing a new boyfriend who was mistreating her. Whatever it was, I was determined to find out exactly what was happening and put a stop to it.



"Lilly, is something wrong?" my mom asked suddenly which sparked me out of my trance. "Huh? N-no, nothing mom, just feeling a little queasy." I lied, looking up at her with my bright, blue eyes and smiling wanly. I saw Ellie glance up at me from the corner of my eye. "I think I'm going to shower. Thanks for dinner, mom." I said, excusing myself as I pushed my chair back and left the room.



I crept upstairs and entered the bathroom before turning the shower onto the hottest setting. Within moments, the mirror on the wall had begun to fog up and I saw silvery waves of steam flow through the air like ghosts under the lighting. I reached around under my shirt and unhooked my bra before whipping off my t-shirt and tossing them onto the floor. I wiped the mirror with my hand and looked at my reflection. The girls in my family had all been blessed with big boobs with Ellie having perhaps the largest. Mine were considerably smaller but they were still more than a handful. We all shared the same light, ginger hair which looked blonde in most lighting. I had piercing blue eyes (which were perhaps my favourite feature) that looked all the more piercing with my pale complexion. I was in fairly decent shape too. I mean, I didn't do much exercise and my diet wasn't great, but you couldn't tell by looking at me. My mom says it's down to my genetics and it'll all go south once I hit my 20's. I only turned 18 a few months ago, but Ellie was 21 and she still had a good figure. She could look chubby at times if she wore the wrong clothing, but this was only due to her huge boobs.



I finished undressing and stepped into the shower, shuddering as the red hot water splashed down onto my bare skin. I smoothed my hair back out of my face and shut my eyes, revelling in the moment as my body adjusted to the heat. Goose pimples erupted over my body and my nipples grew hard and erect, but these effects were only temporary as my skin softened due to the heat. Moments later, my thoughts once again returned to Ellie and her mystery bruises. She had been spending a lot of time in her room, but this was nothing too out of the ordinary. And like my dad had said, she had been going out drinking with her friends now that she's turned 21...maybe she was getting into drunken brawls?



Ellie was due to go out tonight, and Brooke and I had a plan. It wasn't a good plan at all, but it was better than nothing and relatively simple too. When she goes out, Brooke and I would follow her in Brooke's car and see where she goes. If she goes to a house I didn't recognise (as I knew where most of her friends lived) this would suggest a secret boyfriend. If she goes to her friend's house, we would tail her to whatever club she goes to for as long as we could. Hell, we might even get into the club ourselves without any ID! I knew for a fact Ellie had done this a handful of times herself before she had turned 21. I flicked the shower off and allowed the water to drip off of me for several moments before stepping out and wrapping myself in a towel. I grabbed my phone from the bundle of clothes on the floor and checked the time: 7:13pm. Ellie was due to go out at 8:30pm, more than enough time to get ready.



"Hey! Hurry the fuck up in there!" Ellie's voice rang out, followed by several heavy thuds on the bathroom door. Guess that was my cue.



***************



"Hey...enjoy your night, I'm staying over at Brooke's and was just about to go," I said, peeping my head around the door of Ellie's bedroom one hour after my shower.



Ellie was brushing her hair and looked at me over her shoulder. "I always do," she replied in an almost sing-song voice.



"You going out like that?" I asked, motioning to her casual clothing which was nothing like the dresses she usually sported.



"No, idiot. I'm getting changed at Lucy's," Ellie shot back, motioning to the bag on her bed.



"Oh, okay, whatever," I said rolling my eyes.



"Bye then!" Ellie shouted at me as I withdrew from the doorway and made my way down the stairs.



"Bye!" I shouted, unsure if she had heard me.



"Bye mom, bye dad. Love you!" I called out in the direction of the living room as I opened the front door and made my way down the path to where Brooke was waiting in her car.



I opened the passenger side door and tossed my night bag onto the back seat. "Hey" I said, slamming the door and putting my seatbelt on. "Good evening," Brooke smiled. "Or should I say, detective Lilly?"



I smiled. "Have any other plans tonight?" I asked, eyebrow raised. Brooke laughed. "I guess not. Let's get this bitch then," she said as she sped off down the road only to circle back around the block and park just around the corner from my house.



Brooke was an inch or two taller than me and maybe a few pounds heavier to compensate. Her chestnut coloured hair was also a stark contrast to my light ginger hair and her eyes were a deep hazel. Her boobs were also a little smaller. I had seen them before and was jealous over how perky and firm they looked. Mine were just round and fat. But Brooke had told me that's what guys liked in a girl: "Just big fat tits to play with and to watch bounce up and down!" she had laughed, but I didn't completely agree with this. Hers had more shape, more personality. I remember thinking what it would be like to feel them, to rub my thumbs over her nipples which looked to be constantly erect and to hear her moan. This isn't to say that I was sexually attracted to Brooke, because I wasn't. I also wasn't a lesbian or bi...or at least I didn't think I was. I had only been with one guy before. It was a short and fleeting relationship but had left me feeling hollow when he eventually dumped me due to finding an older and "more mature" girl of 20. But since then, I had begun masturbating. Not often, but enough to destress from time to time. I had also discovered porn and quickly realised that I preferred lesbian porn. Not because I was attracted to the models, but because I could put myself in their position. The lesbian porn I had watched was a lot more intimate than a guy fucking a girl from behind. With lesbian porn it was a lot more personal and in depth. I would see a girl rubbing another girl's pussy and I would know what that felt like because I'd be rubbing my own pussy in the same way. You didn't really get much of that when a male actor was involved, or at least not in the videos I had seen. Of course, nobody knew about this. Not even Brooke.



"Look!" Brooke hissed suddenly as a taxi pulled up outside of my house.



"Here we go," I said quietly, my throat suddenly becoming dry as I watched Ellie walk down the path and climb into the back of it.



Brooke set off at a careful distance behind the taxi as it turned a couple of corners before reaching the main road and picking up the pace.



"You're losing her!" I said in an unintentionally frustrated tone, my eyes wincing as they tried to catch a glimpse of the taxi through the glare of headlights, neon takeaway signs and street lamps.



"I've got her, don't worry," Brooke shot back as her car gathered speed until the taxi came back into view.



We trailed her for a little over twenty minutes before it finally came to a stop. Despite being a Saturday night, the traffic wasn't too bad and we only had to stop for red lights a couple of times. But during the last five minutes however, the route had taken a much more rural route.



"What the hell is she doing here!? Just drive past her and take that right down there out of view," I said.



As we drove past, I saw Ellie step out of the taxi and hurry into the mouth of a gated area which housed a huge, abandoned factory. I only then noticed the parked cars as Ellie rushed past them. There must have been a couple of dozen at least.



"The plot thickens..." Brooke mused as she parked up and gazed through the chain-link fence.



The factory which Ellie had just entered sat on the outskirts of our town and had been abandoned for as long as I could remember. It was the only building for at least a mile radius and was surrounded by dirt paths and thick tree lines.



"It must be some party...surely? Like someone decided this would be a cool spot to hang out and get wasted?" I said, more to myself than to Brooke.



Brooke scoffed. "Here!? I'd much rather be out around the town. It looks haunted! Ugh, so creepy," she said quietly as I continued to gaze at the factory.



"Fuck it, let's go in for a closer look," I said as I opened the door and stepped out into the humid night air.



I crept along the fence with Brooke just behind me. We soon reached the entrance where Ellie had gone through but I couldn't see anyone. Not even any lights on in the windows.



I opened my mouth to ask Brooke how to proceed when suddenly the main doors of the factory swung open to reveal a burly looking man in black attire. He kind of looked like the stereotypical bouncer you got on the door of clubs and bars.



"Hey, you two! What are you doing here!?" he shouted angrily as he strode towards us.



"We're here for the party!" Brooke shot back quickly as my blood turned to ice.



"Oh yeah? And who invited you?" the man replied, now standing in front of us.



"Ellie. Ellie Pinder...she's my sister," I said, my own voice taking me by surprise.



The man's features softened and he looked taken aback. "She invited you to watch her fight?" he asked, confusion etched into his face.



"Er...yeah...she's just got here, you just let her in," I said, more confused than ever.



"Right, well...okay...head on inside and follow the signs then," he said slowly.



"Thanks," Brooke and I both said in unison as we hurried past him and across the concrete yard.



I looked back at him over my shoulder as we reached the entrance to the factory and saw his black silhouette looking towards us. A single red dot was the only source of light and must have been from a cigarette he had in his mouth.



The smell of mould and decay instantly filled my nostrils as we entered the building, and judging by the way Brooke had scrunched her face up it wasn't just me who found the stench to be over powering.



"This way," Brooke said as we turned left through an open door with a large red arrow painted onto it.



"What do you think he meant by fight? What fight?" I asked as we strode down a desolate looking corridor that may as well have been ripped straight out of America's most Haunted.



"I have no idea," Brooke replied breathlessly as we came across another arrow. The time it was pointing to the right which led down a narrow set of stairs.



Brooke and I both shot each other a hesitant look. However, the sound of the front doors slamming shut behind us made us jump out of our skin and practically scramble down the stairs shoulder to shoulder.



As we descended, the sound of voices became louder and louder until we eventually emerged into a dimly lit and surprisingly large room. There was a gathering of people, mostly men who instantly began to eye us up as if they had never seen another girl before. We awkwardly stepped around them, desperately trying to make sense of the situation. I felt exposed, as if all eyes were on me, as if this was some super-secret club and they all knew we weren't members.



Brooke grabbed my hand as she led me to a small clearing where we could stand and try and blend in as best as we could. From this position, I could now see that we were on a raised platform which arched downwards towards a few metal barriers as if we were all boxed in. On the other side of this barrier was a large, thick rubber mat. This area was better lit by a few small floodlights stuck into the walls at the far side.



"What the fuck is going on!?" Brooke hissed as I looked around for any sign of Ellie.



"How the fuck am I supposed to know!?" I shot back through gritted teeth.



Suddenly, a scantily dressed woman came into view as she strode across the rubber mat at the other end of the room. She beamed at the crowd and waved at us all which caused a few wolf-whistle's to be sent her way. She was bare foot and was wearing an extremely short black and white mini-skirt. She had a matching shirt on with the top few buttons undone to reveal her cleavage. She looked to be in her mid 20's. Her hair was a golden blonde which blended well with her tanned complexion. Whether it was fake tan and she was secretly just as pale as I was is hard to say.



"Who's ready for our next performance!" she called out after raising a microphone to her bright red lips. The crowd cheered and clapped in response which caused the girl to smile again as she gazed around at us. Come to think of it, I think she was the referee judging by her black and white attire. Was I about to witness my sister fight someone? Was this mixed martial arts? Kick boxing? Karate?



"As you all just witnessed, Kathryn was no match for Sarah which ended with her squirting all over the mat and being dragged away in utter humiliation..." The crowd cheered once again as the girl took a moment for them to calm down.



"...dragged away in utter humiliation where she is currently being used and abused in the locker rooms just behind me! As per the rules agreed before the match, Kathryn's humiliation will not end there. She is destined to be Sarah's sex slave for the next twenty-four hours! Of course, Sarah was the under-dog here and it was a hard earned victory which saw her fly up the rankings. I'm sure she'll be relishing every second she has with her new pet!" the crowd went wild again. I turned to Brooke who stared back at me, wide eyed and mouth open.



"And now we have another underdog fixture. Newcomer Ellie has fought and lost six times! Will this be her lucky number seven? Or is she destined for another serving of domination from April who has a lifetime record of fourteen wins and five losses? As always, the stakes have been agreed before the match. The higher the stake you put down, the higher up the leader board you'll go! If she loses today, Ellie will be forced to cum not once, not twice, but three times for you all tonight! But her punishment won't end there! She will then be taken into the shower rooms where she will then submit to April in private! As you all know by now, April is a domme through and through. But this only makes it more exciting when she loses! And if she loses today, she has agreed to go into chastity and give Ellie the key for one whole week!"



Again the crowd went into a frenzy as if barely able to contain themselves.



"Lilly...hey, Lilly!" Brooke shouted over the cheers as she tugged on my hand. "Let's go, you don't need to see this!"



My mouth was as dry as sand which made it hard to form words. "No...I do. I just...just trust me, okay?" I said, turning to face Brooke again. My whole body was trembling and my hands felt clammy. But I waited with baited breath, a small part of me truly believing this was all a big misunderstanding or some twisted joke.



"Let's give it up for Ellie!" the referee boomed as she stood back and signalled to something out of our view. But even over the cheers and whistle's I let out an audible gasp as my sister came into view completely naked.



I had never seen her naked before, but even from here I could tell she had a shaved pussy like myself. Her boobs bounced and jiggled with each step she took as she awkwardly made her way across the stage.



"Feeling confident, Ellie!?" the referee asked as she stuck the microphone under my sister's nose.



"Yes, I think I'm due a win and I think it's going to happen today. I've fought well in previous weeks and feel that I've been unlucky with the results," she answered, her voice trembling ever so slightly.



"But what about if you lose? We've seen you cum before, but three times in a row!?"



Ellie shuffled her feet awkwardly. "I need the points and needed to up the stakes," she said simply.



"So the thought of being a sex slave for a day or two is out of the question?" the referee asked.



"I still live at home with my parents, so explaining my absence would be an issue," Ellie replied simply.



"So, tell us about the match you have planned next week then. We believe the stake is an entire seven days as a sex slave?"



My heart dropped and my blood turned colder than it already was. I felt myself grip Brooke's hand even tighter.



Ellie gulped. "Yes, that's right. My parents both go on holiday for a week at the same time so it will work out...if I lose, that is."



"But the person you're fighting...over thirty wins in a row now...surely you won't beat her..?"



"And if I do, I'll be near the top of the leader boards. I believe I have what it takes to be a good fighter, I just need to tap into my potential...it's a risk I'm willing to take."



"Ellie you fucking idiot..." I breathed quietly, mesmerised by what I was hearing.



Ellie's opponent, April, was then introduced. She strode across the mat and took her place at the other side of the referee. She was also naked and must have been in her late 20's so a few years older than Ellie. She had jet black hair and small, perky boobs. She was slim and toned and carried an air of confidence not seen at all in Ellie's introduction. She had a small, thin strip of shaved pubic hair but was otherwise bald down there. Her bare legs seemed to go on forever but she wasn't all that tall, maybe the same size as Brooke?



"So, April. Two losses in a row...feeling confident?" The referee asked.



"Very confident" April replied shortly. Her voice silky, smooth and seemed to float across to my ears like smoke.



"And why is that?" The referee prodded on.



"Ellie seems like a lovely girl but she's no sex fighter. She's a submissive slut who likes being degraded and humiliated. She likes to lose." April replied bluntly which caused an uproar in the crowd. I saw Ellie's cheeks begin to flush.



"And not only that..." April went on, "...I've never lost to a girl with big tits. Why? Because they don't know how to use them. She won't have the balance, the agility or the speed to keep up with me. I'm sorry Ellie, but I will offer you the chance to hang onto but a small shred of your dignity. Get down on your knees and kiss my foot. If you do, you will admit defeat and you can go home unscathed."

