“Fuck’s sake!” Sadie shouted, throwing her phone across the lounge. Luckily it bounced on the sofa before toppling onto the soft fur rug in front of the fireplace, otherwise, it would probably have smashed into a million expensive but useless pieces.”Sadie! Language!” Mum admonished. She never was one to tolerate cursing; she considered it most unladylike.But Sadie was so riled, she ignored the warning. “Fucking snow! Trev’s stuck in town, the mountain roads are blocked, and he’s not gonna make it for Christmas! Fuck my life!”Trevor was Sadie’s latest beau, the most recent in a long line of failed relationships. But this one looked like it might go the distance, judging by the size of the iceberg on her finger. Not just because he was rich – although that helped – but he genuinely cared for her, and he was good for her. She’d started looking after herself, getting down the gym regularly, and was really toning up. Long gone was the slightly dumpy teenager I remembered from years ago, before I went off to college. My little sister had blossomed into an intelligent, attractive young woman, and had even lost much of her brattiness along the way.”Looks like neither of us is getting laid this Christmas, bro.””Sadie!” Mum shouted. “This is supposed to be a civil family Christmas. I don’t want you spoiling it with that mouth of yours!”Sadie wasn’t wrong, though. Kate had dumped me just a couple of weeks ago. It was still pretty raw, to be honest. Three years we’d been together. Instead of going on her finger on Christmas morning, the engagement ring sat in its box, waiting to be returned once I had the strength to take it back to the jewellers.We’d been planning this family gathering, in Mum and Dad’s log cabin up in the woods by the lake, since the spring. It was supposed to be the perfect Christmas with us all together – three adult couples spending quality time in each other’s company. Now there was a very real danger of it devolving into the holidays of our youth – me and Sadie fighting over nothing, causing Mum a load of stress, and arguments breaking out back and forth. It was so not what I needed.///I thrust with my thighs, driving round and round, pushing myself to my limits and beyond. Sweat ran down my back and I gasped for breath, riding harder and harder as I neared the finish line. Then, with an overriding sense of relief, it was over. I slowed the pace, panting and dripping wet, and clambered off the exercise bike. I ran a towel over the seat and handles and stumbled over to the water fountain.I’d decided to burn up some of my frustrations in the communal gym of the lodge complex. I couldn’t stay in the log cabin, not with Sadie in one of her pissy moods şişli escort and with Mum getting increasingly wound up by it. I came here to take out my aggression on the equipment. And while it was working wonders on my muscles, it was only adding to the problems with my libido.I have quite a high sex drive; I think we all do in our family. I’d had to invest in earplugs so I didn’t have to listen to my parents ‘doing it’ when they thought I was asleep. Once I’d moved out to University I no longer had that problem, and then of course Kate and I had moved into our flat together. But these past couple of weeks I’d been back in the family home, and had to reach for those earplugs again a few nights a week. You go, Mum and Dad, I thought. I hope I still get to be that active when I’m in my fifties. Quite what Sadie made of it, I had no idea.Time for cross-training. I stepped into the torture device, started to pull at the rods with my arms while my feet swung and pushed below. It wasn’t long before my heart was racing; and with it, my mind as well. I looked around my fellow gym attendees. Not a lot to look at… except for the rather stunning babe over by the weights. I could only see her from the rear, but that was an epic sight to be sure. A nice tight arse; she was doing squats, presumably to plump it out a little. By God, she had firm thighs and nice legs as well as that perfect peachy butt. With my cock starting to stiffen, I kept begging the universe to make her turn around, so I could check whether the front view held up to the promise of the rear. She started to turn and my eyes caught a glimpse of rock-hard abs and the swell of generous breasts. My god, she’s an absolute goddess! I’m gonna have to go over and introduce myself.Then I saw her face, and I nearly died.Because, of course, it was Sadie.My sister.I’d spent the last five minutes lusting after my own sister. I felt almost physically sick.But you must realise, I’m not accustomed to seeing her in body-hugging spandex and lycra. I’d see her in loose jeans and voluminous jumpers, if I saw her at all. The Sadie I knew, before I went to college, was a petulant teenager who spent her life in goth make-up and black baggy outfits. I knew she’d turned her life around, with this Trevor. But by God, she was almost unrecognisable. I couldn’t help but wonder if he’d paid for her to have some work done, such was the transformation.Suddenly, the gym wasn’t the place I wanted to be either. I hit the showers, ashamed of this erection that refused to die. I knew there was only one way to kill it, but I really didn’t want to go there. I tried not to think about her, but my brain kept going back to that vision of şişli escort bayan her perfect arse bobbing as she worked her glutes. So I relaxed the death grip I had on my cock, finished my shower, towelled off and got dressed, nursing the semi all the way back to the cabin through the snow, hating myself, ashamed of my deranged thoughts.///Christmas Eve went by in a blur of board games and movies, just the four of us. It was actually quite pleasant. A few glasses of mulled wine helped smooth over the rough edges and we enjoyed our time together as a family. Everything was just perfect, right up until Mum decided we should all go out to the hot tub and watch the snow falling, and see in Christmas Day from there.Which is how I found myself sat, with my parents cuddling and giggling like horny teenagers beside me, in a bubbling jacuzzi, in time to watch my now very toned sister emerge from the lodge in a daring red-with-white-edging bikini. The kind that Mrs Claus might have worn, if she had a side hustle as a Playboy Bunny.”What?” she said, defiantly. “This was supposed to be for just me and Trevor. It’s the only swimsuit I brought.””Very festive, dear,” Mum deadpanned.I closed my eyes. I really didn’t need that image of her boobs trying to burst out of the bikini top to get embedded in my memory. I waited for the splashing to end, knowing it was then safe to look since all bodies would be safely hidden under the water.We had eggnog as we watched the snow settling on the pine trees, looking across over the moonlit lake. It really was quite magical. A happy family enjoying each other’s company.Dad whispered something dirty into Mum’s ear – I knew it was naughty by her giggly schoolgirl reaction. “It’s time for us to hit the hay,” she said. “I need to go and fill out the stockings for your father to enjoy. Don’t stay up too late, kids!” Mum climbed out of the hot tub, Dad followed and slapped her ass and they both ran back indoors.I rolled my eyes at Sadie, and she shrugged. “Nice to see them happy, though, isn’t it. Wish I was getting lucky tonight.”I made a non-committal kind of noise.”I wonder how many times they’ve fucked in this hot tub?” she asked.I looked at her. “I really don’t want to think about that.””Get over yourself, sex is natural. We wouldn’t be here if they hadn’t done it.””La la la, can’t hear you,” I said, but I laughed, and she laughed back. The water ripped in a most appealing way, the bubbles drumming a tune against our skin. I could see her flesh rippling…”Are you staring at my tits?”Oh god. “It’s hard not to look, sis. They’re right there, by your face, bouncing in the water.””You pervert.” But there was an edge, a tine, mecidiyeköy escort to her voice. She didn’t seem disappointed. I must have imagined it, surely. God, I was horny; I hadn’t had sex in weeks.”You coming out?” she asked.I was ashamed to realise that I couldn’t. Not yet. No way could I stand up and lift my raging hard-on out of the water and into full view. I had to stay hidden in the bubbles, no matter how much I was boiling alive.As she clambered out of the tub, I tried to look away, but not fast enough to avoid seeing her toned new body, dripping wet, in that tiny fuck-me Christmas bikini.How fucked up is this, I thought to myself. I am such a bad person. My own little sister, giving me the horn. I looked away as she ran through the snow back indoors, not wanting to risk another glance at that now-perfect ass.///I had to put the earplugs in, in the end. Mum and Dad were really going for it for Christmas. I so did not need to hear that. Not while I was already so horny.Sleep refused to claim me, even after I wanked myself off to videos from the internet. I didn’t dare use my imagination – what with Mum moaning and Dad groaning next door, and my brain wanting to replay images of Sadie in her gym shorts and that bikini, I didn’t trust my thoughts not to wander in an entirely inappropriate direction.Eventually, silence reigned. But my mouth was so dry. I had to get myself some water. And now I was awake, I needed a piss. Great. Can’t use the bathroom up here, it’ll wake everyone up. I crept down the stairs, trying not to disturb anyone in the darkness of Christmas morning. It was some time between two and three AM, I reckoned. I relieved myself in the downstairs cloakroom and then headed in the darkness to the kitchen to get some water. A nice cool stream from the fridge tap into a glass; I took a deep draught and sighed. Much better.Then, as I turned to leave, I noticed a yellow flickering light coming from the lounge; light that I swore hadn’t been there when I came down. Maybe I’d woken somebody up after all, and they’d lit the fire. Or maybe it was Santa on his rounds, I laughed to myself. Or maybe it’s a burglar coming to steal away our Christmas. That thought, ridiculous though it was, made me pause – so rather than calling out and flipping on the lights, I crept to the doorway and looked out.I nearly died.Sadie lay on the white fur rug in front of the fire, trussed up in exotic red lingerie. The sheer plunge bra pressed her already-bountiful boobs together and up, amplifying her generous cleavage and trapping a thick gold rope necklace between her round flesh. The thong presented her round arse perfectly, the suspender belt holding up the thigh-high mesh that reached down into the bright red stilettos. She was staring towards the Christmas tree, talking to it as she writhed, cat-like, across the floor in front of the fire that reflected from her pale skin. I had to admit, she looked hot as fuck.