It was my first college Halloween party, and I was beyond stoked. The party was being held at a local frat off campus, and although I hadn't pledged to any frat I was still known in their circles. I never moved out of my parents house, and while it saved me a bunch of money, it definitely put a damper on my social life.
I had procrastinated on my costume, so I found myself scrambling at the last minute to come up with something. Out of ideas, I finally settled on the cheap idea of going as Michael Phelps. All I had to do was wear a speedo, hang a towel over my shoulders, and wear a few fake gold medals.
I headed downstairs to our kitchen to eat something light before the party, when I bumped into my little sister.
"Hey dummy, what's that?" I asked, pointing to a Spencer's bag that she was holding.
"It's a costume, dummy," she replied, parroting me, "I'm going to a party tonight."
"What did you get?" I feigned interest. I was done with her basic high school parties, and I felt superior about our slight age difference putting me into college a year ahead of her.
"Wonder Woman," she said simply, without opening the bag to show me.
"BORING, I'm gonna be Michael Phelps, gotta show off my swimmers body," I boasted.
"Don't care," she chimed back.
At the point we were both obviously bored talking to each other, so I made my food and went upstairs to change. My sister and I were never especially close, despite being basically the same age. A few of my friends were into her, but she never gave them the time of day, and we ran in different circles.
I had already put our interaction out of my mind by the time I was driving over to the party, I was too excited about getting out for the night.
I got there fashionably late, and the party was already going pretty hard. The party was mostly college students, but after hanging out and mingling for an hour I noticed a few high school kids. I took stock of the women around, and wondered if I might be able to get laid tonight. I wasn't a particularly thirsty guy, but living at home made it harder to chase tail.
I noticed all the usual suspects, and most women were already paired up with boyfriends or frat boys. I saw slutty angels, slutty demons, slutty cats, basically the same tired costumes that get recycled every year. I wasn't really complaining though, there was definitely a lot of talent at the party, and I appreciated the chance to gawk.
As I made my way out to the pool area I was stopped in my tracks by a vision in underwear. She was surrounded by guys, mostly from the frat, and I didn't recognize her from the back, despite how much time I spent staring. She was wearing very little, only blue boy shorts with white stars printed on them, a tight red tube top, and a gold tiara on top of her long blonde hair. I saw her turn down a beer and politely push away a guy trying to get to close, and I made my way over to get a better look.
If I was stunned by her beautiful body earlier, I was absolutely frozen when she turned and I saw her face. My own little sister, dressed slutty at a college party, and the cherry on top was that her body was amazing. My head was filled with confusing feelings. I was simultaneously upset with her being there, and proud of her that she wasn't just accepting beer and advances from strange dudes. We had been brought up well, and neither of us was interested in drinking or hard partying. I was furious that she would wear something like that in public, but my dick definitely appreciated the view. I had never been overly protective of her, but seeing her like this made me see her differently. It was like a switch flipped in my mind, I now saw her as a woman instead of just my sister.
I took a walk to calm myself down. I was in control of myself, but I couldn't afford getting a hard on in a costume like this. After a few minutes I got over it, and went to hang out with some people I knew. I let the thoughts of her leave my mind, I wanted to enjoy the party and not deal with her for now.
A couple hours went by, and gradually the party guests got a little more loose. I saw a few people drinking who probably shouldn't have been, and I smelled weed coming from one of the bathrooms. The music wasn't that loud, but the party was pretty packed, and it was getting pretty late.
I refocused my efforts on trying to get laid, and made another lap around the frat house. I saw a few slutty nurses, an Elvira, a Lady Gaga, and a girl just wearing a bikini. I made small talk with some girls, but my game wasn't great so I made little progress. Frustrated, I had wandered close to the front of the house when I first saw the flashing blue and red lights.
Instinctively, I darted toward the backyard, but I was too slow. There was a cop knocking on the front door, and at the same time a few other cops had headed down the side yard.
While I hadn't been drinking, I still wanted to escape the situation. A large group of people streamed in from the backyard, and my sister was one of the first among them. We made eye contact, and I could see the terror on her face. Our parents were pretty conservative, and if she got brought home by the cops dressed like that there would definitely be hell to pay.
Thinking quickly, I scanned the room for options. I noticed a door to a closet that was mostly obscured by Halloween decorations, and I grabbed my sister by the arm before making a beeline toward it. It was mostly full of coats, but there was barely enough room for us to squeeze inside. Before shutting the door, I had the forethought to slide a nearby recliner closer to us, even further obscuring the closet.
I jumped in behind my sister, and shut the door quietly. We seemed pretty insulated, but I could definitely still hear the cops in the house rounding up and questioning people. Some neighbor must have called them, and I cursed under my breath at our situation.
Pressed tightly against my sister, I felt around quietly to see if there was a way to make more space for us. We both stood silently as I struggled in vain, and I couldn't help but feel her ass grinding against me as I shifted around.
I heard crying outside the door and loud cop voices talking about finding weed, and I knew that we were likely stuck there for a while.
"Thanks for hiding me," my sister whispered, turning her head toward the back of the closet to face me slightly.
"No problem, dummy," I replied, "but I think we might be stuck here for a while."
"That's fine with me, I don't want to be associated with any of that shit out there," she said.
"Same," I said back simply, then followed up with "Hey, I saw you out by the pool earlier, I watched you push that skeevy dude away."
"Yeah, I was excited to come to this party, but there were definitely some creeps here," she explained.
"I almost can't blame them," I slipped out, "look at what you're wearing."
"Fuck off, prude," she elbowed me lightly as she responded, "I'm Wonder Woman."
"Barely," I said, laughing under my breath, "I wouldn't have known if you didn't tell me earlier."
"What? It's obvious, no one asked me who I was," she said defensively.
"They were probably too busy checking you out," I said, "I didn't even see the Wonder Woman logo on you."
"I've got it hanging on my top," she replied.
"Let me see," I said, then lifted up on my toes to look over her shoulder.
The view was incredible, and while I didn't intend to perv on my sister, I didn't stop myself either. Sure enough, she was right, but I still took a second to stare at her tits.
"It's too dark, I can't tell," I lied, lowering back down behind her.
She responded by grabbing my hand and pulling it around us, before setting it down on the cheap plastic logo hanging off her tube top. Apparently she felt VERY comfortable with me, but I was getting increasingly worried about trying to suppress a boner.
I felt the logo, and dragged my hand as inconspicuously as I could on the way out, lightly feeling her tit as I did so.
"I guess you're right, my bad," I replied, paused, then said, "it's still a pretty slutty costume though."
In return I got a harder elbow into my ribs.
"You're the slut if either of is," she accused, "look at what you're wearing."
"Psh, this is what he actually wears, Wonder Woman wears way more than you are," I retorted.
"Well, I didn't hear anyone complaining," she replied.
"You won't hear me complaining either," I said back. It felt slightly inappropriate coming out, but she didn't react to it.
We settled in for a moment and listened to the noises outside. More cops had arrived, and they were still rounding up people. I wasn't sure if my closet gamble would work, but I hadn't heard any footsteps close to us yet.
My sister shifted in front of me, apparently trying to readjust. Her ass backed firmly into my dick and pressed it up against me, and she held there as she found a more comfortable position.
"Uh, sis..." I started, trying to imply what I meant without having to say it out loud.
"I know, I don't like being stuck in here with you either, but we don't have much choice, do we?" she asked rhetorically.
I don't know if she was being coy or if she was really unaware of our position, but I didn't press it. I focused all my energy on trying to suppress a boner.
Baseball, grandma, hangnail. I floated unsexual thoughts through my head, but the sight and feel of my sister in front of me was starting to get to me. I started to chub up, my cock stuck upright between her ass cheeks.
SCOLIOSIS, HITLER, GIRAFFE. I tried to force my mind in another direction, but our physical proximity overruled my brain. Within a few seconds I was full on rock hard, and there was no way she couldn't feel it as she shifted slightly on her feet. I grabbed a handful of coat and squeezed hard, trying to focus my mind on any sensation other than that of the hot piece of ass on my dick.
"Um, is that..." she breathed out softly.
I was mortified, but I knew that there was no denying or hiding it. Despite my embarrassment, my dick didn't get any less hard.
"Sorry," I barely managed to form the words, "I can't help it. It's not just you, there were a bunch of hot chicks here."
