Author's Note: Possibly unnecessary warning, this story contains a lot of butt stuff. Use your own discretion.
Thanks to LizHaze for proofreading.
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Part One: Something New
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I stood up from my computer and stretched. It was getting late, pretty well time for bed.
I padded on bare feet out of my room and down the hall in just my sleep shirt and panties. The bathroom was past my brother's room, but I didn't intend on stopping in to say goodnight. He had his girlfriend over, and it would be rude to interrupt if they were up to anything.
It was kind of weird for a brother and sister to still be living together in our twenties. I wasn't oblivious to that. All the other siblings I knew had split up and gone their own ways after moving out of their parents' homes. It was different with Logan and me.
In my mind, there'd never been any question of us not living together. It just hadn't occurred to me. Logan probably would have been happy enough doing the usual thing and going off on his own, but I was pretty sure he was happier staying with me. We were cozy, codependent little sibbos like that.
Moans of pleasure filtered down the hall as I approached Logan's room. Yeah. He was definitely getting some. Good for him.
Even better, as I discovered shortly after, Logan had left his door cracked open. I grinned and glided forward like a ninja to take a peek without disturbing anything.
I couldn't see much of the action through my sliver of exhibitionist light, but there was no mistaking the action inside the room for anything other than fun sexy times.
Erin, Logan's girlfriend, was naked and on all fours on his bed. My brother, equally naked, was behind her, hands on her hips, cock presumably buried in her. He was rocking against her, engaged in gentle thrusting. Maybe they'd just started or something and he was getting her warmed up. Or maybe that was all Erin could handle. Hard to say.
Erin shifted her position, leaning farther forward to bury her face in a pillow. Her moaning became muffled and, more importantly to me, she wasn't able to see much of anything.
I took my opportunity to carefully push the door a little wider open. Logan caught the movement, as I'd assumed he would. He turned his head toward me and grinned. I smiled back and flashed a thumb's up sign.
What the hell, gentle sex or no, Erin was pretty hot. He'd done ok for himself.
Logan's attention was already back on his girlfriend, as well it should be. I decided to watch another minute or two, then leave them be.
It was kind of fucked to enjoy watching my big brother having sex. That, too, was known to me. It had just never seemed like much of a big deal to me, and Logan had never minded. Actually, I was pretty sure he liked being able to show off for someone. 'Ooh, look at the girl I'm banging, hot right?' kinda thing.
I slipped a hand under my shirt and ran a finger over the front of my panties. Starting to dampen. Probably time to get moving then. I didn't want Erin to catch me standing there masturbating like a total perv.
Then I realized what I was actually watching.
Logan grabbed Erin's ass cheeks and, possibly for my benefit, spread them wider. My eyes bugged and I stifled a gasp. He wasn't in her pussy at all.
A few little things clicked in my head once it became clear they were doing butt stuff. Of course he was being gentle, he'd have to be. And Erin's slightly awkward position was to facilitate entry into an entirely different hole than what I'd expected. Goddamn.
Despite firmly wanting to control my masturbatory urges, I couldn't help fingering myself a little. Just over my panties, nothing excessive, just enough to take the edge off.
Logan was butt-fucking his girlfriend right in front of me. No wonder he looked so self-satisfied. He looked that way during and after sex anyway, but his smugness was even more pronounced this time.
His idea or hers, I wondered. She certainly seemed to be enjoying herself as much as he was.
I'd never much liked the idea of putting things up my butt. Nor, indeed, had I met anyone else who openly enjoyed it. I'd seen such things on the internet, of course. It was far from the grossest fetish I'd explored online out of curiousity or horniness.
Real life was something else entirely. Logan and Erin weren't just some naked actors on my computer screen, they were people I knew. And they were actually there, right in front of me. I could have run in and touched them.
My fingers slipped beneath my panties. I was getting so goddamn wet down there. I bit my lip and fingered myself a little while longer, then reluctantly straightened up and eased the door closed again.
Well fuck. All I wanted to do was go to bed, and now I was a horny mess. Thanks, Logan.
I got ready for bed and returned to my room. I had to fight the urge to back and perv on Logan and Erin some more.
I stripped fully naked in my room before making a selection from my 'toy box'. Some play time was going to be essential if I wanted to get to sleep.
I opted for my favourite purple dildo and decided against bringing my bottle of lube along. There was no need for it. My little pussy was already drenched.
Alone in my room, door closed, lights off. Perfect. I snuggled comfortably on my back and closed my eyes.
The scene of anal debauchery was still fresh on my lids. Logan grinding on Erin's ass, the delirious moans they made, that thrill of illicit discovery when I'd realized what hole my brother was using...
With slow, delicious anticipation, I pressed my dildo to my pussy. It entered smoothly, filling me up nicely until I was completely stuffed. It was my favourite toy for the very reason of just how perfectly it matched my vagina, and how beautifully it satisfied my occasional need to be thoroughly penetrated.
I thrust my dildo lazily in and out, gradually increasing the length of the back and forth motions. Flashes of mental sexiness accompanied my self-pleasure, greatly enhancing my masturbation.
My free hand trailed down beneath my dripping pussy. Some juices had already streamed over my butthole. I swirled a finger over the tight entrance, massaging in some natural lubrication.
Could I ever do butt stuff? I mean, of course I could, if I wanted. It was all a question of whether I did, in fact, want. An hour earlier I would have laughed and given a firm 'no'. Anal was for porn stars and cam girls, not for li'l ol' me.
But Erin had been enjoying herself. And Logan too. Not that either of their opinions had anything to do with me, but still.
For some reason, an image entered my mind of my brother peeking in my room at me getting fucked in the butt. My pussy clenched involuntarily, briefly halting my dildo's rhythm.
What was that even about? Was it really that hot imagining my brother watching me get ass-fucked?
My tummy gave a flutter as I jammed my dildo back inside me. Yes. Yes it was that hot. For some reason, I really, really liked the thought of him seeing me be a little butt slut. Probably it was just the novelty and naughtiness of it all. Probably.
I moaned aloud and arched my back as I kept playing with myself and allowing my fantasy to get deeper and dirtier. Occasionally my mind-movie went so far as to cast Logan as my anal lover. I felt a tiny bit ashamed of those visions, but they were also the hottest.
Me on my knees, face buried in a pillow just like Erin. Ass stuck up in invitation. Logan behind me, maybe smacking my butt a few times. Then him inside me. Inside my ass.
Getting fucked in the ass by my brother. Goddamn.
I came without so much as touching my clit. Usually it took some clit-play to get me there. Not tonight.
I kept fucking myself through my orgasm, and I was pretty sure I whispered my brother's name a few times. I slowed down in synch with the diminishing of aftershocks, then eventually pulled out my dildo. It was so slick. I sucked on it a bit just for the hell of it. I liked the way I tasted, but only when I was in the right mood.
Shortly thereafter I pulled my blankets up and went to sleep.
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The house was quiet the next morning. I crept by Logan's room in my sleep shirt, knowing there wouldn't be more sexy times to spy on, but somehow hoping there would be anyway. It was silent from within so I moved on.
I poured two bowls of cereal in the kitchen. I carried them into the living room, then grabbed the milk out of the fridge and poured some in my bowl. I left the milk on the end table on Logan's side of our awesome, comfy couch, along with his bowl of cereal.
Since I was first up today, I got to pick what to watch. I loaded up the series I'd been muddling through on Netflix and curled up with my breakfast.
Logan awoke not too long after. I heard him run the shower and flush the toilet, then eventually make his way to me.
"Morning," I said.
"Morning, Kelse." He poured his milk, then sat down beside me. "How'd you sleep."
"Fine thanks. Not as good as you, I imagine."
