My sister [F19] and her roommate [F19] throw me [M21] a pajama party to celebrate my graduation and determine which of them is the slut of the year.

I was a senior in college when my sister was a freshman. We ended up going to the same school, which was a blessing and a curse. I adored my sister, but I hated my school.

That's not true. I just felt rejected and alone senior year. Towards the end of the school year I got in a fight with my roommate. It's my fault, I was sleeping with his girlfriend. No excuses, I was in the wrong.

I needed a place to stay for a few days. My sister, Callie, told me that I could crash in her dorm, her roommate, Arya, was always sleeping at her boyfriend's, so the second bed was free. It worked out. I never even saw her roommate until after the school year ended. I still had some last minute make-up work to do, so it was Saturday when I was done. All I had left was graduation. My sister wanted to celebrate before our parents arrived the next day.

The plan was to have a pajama party with her roommate and do 'shrums. Most of the occupants had already left for the summer, it was a freshman dorm and the only people left on campus were seniors graduating and their families. We were able to fill the dorm room with mattresses and blankets from the empty rooms, which along with the girls own generous collection of blankets turned the entire room into a giant bed.

I think to myself, it is my last night on campus, my last night at school, and I am hanging out with two girls who just finished their first year, taking mushrooms and having a pajama party in a dorm room. I felt like I was getting younger, not older.

My sister and her roommate were in matching fuzzy pink bunny onesies. It was adorable. Callie has always been attractive, with a curvy body, large breasts, and a thick mane of dark curly hair. Somehow the loose-fitting pajamas did nothing to hide her natural hourglass figure. God my sister had amazing tits. Arya was much thinner, and had shaved her head completely smooth. Her breasts, however, were generous as well and bounced freely in the pajamas. It was intoxicating.

Callie put on Sigur Rós on a Bluetooth speaker, and pulled out a container with a bunch of blue and pink gel caps. "Blue for boys, pink for girls" she said and took two pink ones with a sip from her water bottle, passing two pink pills to Arya and two blue ones to me. We took the pills and passed the bottle of water around.

"What's in them?" I asked, probably a little late.

"I don't know? Molly, Shrums, Viagra, Acid, all three, fuck I don't know. Shannon said they were fun." My sister said lazily. She handed me a blue bunny onesie to match the girls. "Blue for boys."

The girls both pretend not to watch, badly, while I stripped to my boxers. "Take it all off, we have to match," Callie teases.

"Jesus sis, don't be a whore." Despite my words, I removed the boxers, and the girls got a view of me while I stepped into the bunny outfit, comando, and zipped it up.

We passed the bong around a few times and the girls started gossiping about the various cocks they had sucked that year. Of course, I paid close attention and pretended not to be listening.

"Dave." My sister wanted to make sure I was listening. "Can we show you something?"

"Sure." I really hope it's their tits, I thought. I was stoned and starting to get really horny. It was looking like it was gonna be a blue balls night unless I could convince Arya to blow me behind my sister's back. Arya who had a boyfriend. Shit. I'm not a good person.

My sister pulled out a notebook with a short piece of measuring ribbon as the bookmark. The book, she showed me, had the name of men she had measured and given head to, and after each measurement a brief description of the penis followed by notes on how the blowjob went.

Arya kept a similar notebook. Apparently, today was the day they would tally the results and compare.

While Callie is adding the results, humming happily to herself, out of time, to the music, Arya crawls over the blankets to me, giving me an evil look. Callie looks over. "Too late, Ar, year's over. Can't suck Dave to get an edge now."

Arya pouts. "Can I suck him for fun?"

"Keep your filthy whore mouth off my perfect brother's cock!"

"I was just asking!" Arya smiles at me and stage whispers, "I am totally going to blow you tonight, don't worry." Well, I guess that is a relief!

"Okay. For the first category, total unique cocks sucked. The winner is... Arya! With 76. Callie got second with 72."

"There's only the two of us competing," Arya points out.

"Shut up, I'm making this fun." My sister giggled uncontrollably for a minute or two. We all joined in. "Your prize is you get to take a bong hit!" My sister laughed some more, "then you can unzip either my pajamas or Dave's pajamas and take a look" followed by more laughs in a ceremonial unzipping and zipping of her outfit, flashing us briefly.

But, with no hesitation, Arya pounces and unzipps my pajamas and exposes my now completely hard cock. She whistles.

"That's got to be 20x18. At least."

"You're metric?" I ask.

"We're scientists, Davey." My sister points out. "Anyway, Arya best get the ruler."

Arya measures me with the tape from her notebook and announces, "22x19. And change. God damn. It grew when I touched it." She pulls back into her pile of blankets, smirking and looking at me like I'm a gazelle separated from the herd and she's a lionness.

"In the next category, total unique centimeters sucked," Callie shouts, trying to get Arya's attention away from my body, "the winner is... Calllie with 1,324cm. Arya comes in a distant second with 1,145cm." Callie claps and does a little dance, out of time with the music. "My prize is I get to see Arya's pussy." She crawls over to her roommate, who is now wrapping herself in blankets, pretending to escape her roommate's advances. "A little help, here, Dave?" My pink bunny sister asks.

With my cock still exposed, the onesie zipper still half undone, I lept over, wrestled with Arya in the blankets, and pinned her down. My cock was hard, and pushed against her fuzzy pajamas. I pulled back a little and Callie unziped Arya's pajamas, all the way down the leg.

My cock was inches away from Arya's beautiful shaved sex and its large glistening labia lips. We were both breathing heavy, our eyes locked, and I was about to plunge into the freshman slut when my sister slaps my cock. Hard.

"My pussy!" She growled. And I sat back, making a huffing sound. "Ok. Next category. Biggest unique dick. The winner is... Me, again, with Ethan at 36x24."

Arya and I both stared at her. "You swallowed 14 inches of cock? You can't just measure it, Callie. You gotta swallow it."

Callie grabed her phone, started flipping through page after page of selfies she has taken of herself sucking dick. She got to one, that is gigantic and black. There are two photos. The first has her lying down on a couch, with her feet on the back and her head hanging over the front. She is holding the hard cock against her face, demonstrating that it is longer than her head. He is standing behind her and the penis stretches below her chin. Then, in the second photo, she has the entire thing buried in her mouth. The angle of the photo makes it clear that Ethan who was the photographer. Callie's hands are on the floor, her head bent back, her enormous breasts exposed, but all we can see of her face is her chin because Ethan has all 14" inside my voluptuous sister's mouth. I grabbed the phone and check the time stamps. They are 15 seconds apart. I quietly airdrop the pictures to my phone.

"Wow." Says Anya, which is what we are all thinking. "What's your prize?"

My sister didn't say anything. She just placed her head between Arya's legs and started licking. A few seconds later she looked and asks me to take pictures. I took her phone and started shooting photos of my Baby Sister Callie lapping at Arya, moving around to find different angles. I airdroped all her remaining photos to my phone. For safekeeping. Then, I started shooting video.

Callie started sucking on Arya's clit and fingering her soaking bald pussy. Arya moans as I filmed the whole thing. At one point I shed the bunny outfit and stood completely naked over Arya, filming my sister up close with my dick waving near the bald girls face. Arya grabed it and started stroking it while Callie was distracted. As soon as she wrapped her hands around my cock, Arya came. Hard. She squeezed me so hard that a drip of precum came out and landed on her lips. I didn't catch it on film, because I was too busy filming my sister lapping the quivering pussy.

Callie pulled her head away, sat back, face wet, and looked at me, then Arya. She striped out of the bunny custom, and all three of us were completely naked. We sat cross legged in a triangle formation, looking at each other.

"Time to decide slut of the year. Callie!" Callie shouted.

"Hold on, I sucked four more cocks than you. Also, I slept with lots of older men while you sucked off football players and frat boys. That makes me the bigger slut."

"I sucked almost two meters more cock than you!" My sister said loudly, and I remember thinking, presciently, the RA, and anyone else still in this empty dorm, must have heard that.

"I sucked 12 professors. You only sucked the 4 whose classes you took." Arya retorts.

"Ladies." I announced. These two beautiful foxes shouldn't be fighting over who is the sluttiest. "I have an idea! A contest! You each take turns sucking my dick for 1 minute and whoever makes me cum gets to be sluttiest bitch."

Before I know it, Callie had her lips around my cock. She quickly took the whole thing into her mouth and pulled out, gagging, but undeterred. She then bobed on me rapidly and milked the juices from my cock in far less than 60 seconds, swallowing the load as my penis is buried in her mouth. I pulled out and my dick was covered with snot. Callie said, "I'm the biggest slut because I just blew my own brothers 8" dick and swallowed his load."

"8 and 3/4 inches," Arya corrected.

***

That was the moment that we heard the knock on the door. Then the sound of the key. Then it opened. The room was still filled with lingering pot smoke, all three of us were naked, and we all look like we'd been fucking. Derick, the RA, walked in starred at the three of us.

He didn't say anything for a beat, which gave Arya the chance to say, "Callie just won slut of the year. Do you want to fuck her?"

I saw the look change in Derek's eyes. I saw any desire to do the right thing, to report us, to call campus police, to take the drugs, to kick us out, all of it left his eyes in a second. All he wanted to do was fuck my voluptuous sister.

He stripped off his T-shirt like he was the muscle man in an underwear commercial, which looking at his chiseled black body, he might have been. His gym shorts and briefs were off of him before Aria could stand up and walk over and pull them down, which she was on her way to do when he walked right past her and shoved my sister down onto the mattresses. Spreading her legs he began to hump her, right there, with abandon. Callie laughed audibly as he pounded her. He pounded her faster, a little mad that he was being laughed at, but we were all very very high. He grunted like a frat boy and emptied himself inside her.

After pulling out he looked at me. He was a little angry. He came in here hot, he got laughed at while having the best sex of his life, he was really confused and I could see it in his eyes. "Fucking loser David. You're the adult here. Fuck David, clean your sister out."

He stood up and grabed Callie's phone. He took pictures as I slowly licked my sister's cunt, gently removing his juices from her labia. Callie hadn't lost her case of the giggles and was laughing the whole time.

"Suck it out!" Derrick yelled at the top of his lungs. I complied and sucked the remaining semen from her cunt. She was quite full. I actually swallowed some of the large black man's cum, the entire time my sister laughing with absolute abandon.

"Jesus Christ that's fucking perverted! You sick fuck!" He said when I looked at him, covered in my sister's natural lubricant, and I just started laughing too.

I fell over, too dizzy to even remain on my knees, and used my sister's wet sex as a pillow, soaking my hair with her juices. It took about 5 seconds before Arya is riding me like a cowgirl chasing down a stray bull.

The bald girl moaned loudly and pounded me with every bit of energy that she had been saving up the whole evening, and likely some sort of kick from the pink pills. My sister, with her thighs on either side of my head, shouts, "ride my big brother, you cheap whore. Ride him like you rode the lacrosse team!" She laughed again. I could feel her pussy lips against the back of my head move with each giggle.

"The entire lacrosse team," Derrick, star lacrosse player, says as he steps over me. I can see his tight muscular butt above me, and his large cock and dangling balls as he grabs Arya's bald head and proceeds to use her mouth like a fleshlight. She is twitching and twisting on my cock as he does it. He pounds her for an eternity, it seems like he's pulling her on and off me by her head while he fucks her mouth. Finally, after way too much time, he pulls out of her and she gags and coughs and collapses onto me. I wrap my arms around her twitching body, my cock still hard inside her, as she convulses for half a minute. Then, as she catches her breath, she spontaneously cums and squeezes my cock so hard that, if it weren't for the Viagra in the blue pills, I would have slipped out. Instead we both groaned. I didn't cum. I was as hard as I've been in my lifetime, but I didn't cum. Arya kept twitching above me, squeezing my cock randomly with her pussy. My sister ran her hands through Arya's hair, soothing the poor girl who just blacked out with a cock down her throat.

"You guys are really fucking high," Derrick said and proceeded to place his cock against the prone Arya's ass. He spat, managed to hit his cock, and pushed it in. I felt his cock against mine, slowly rubbing against it as he shoved it into Arya's ass. Arya was stirring and mumbling against me, I could feel her trembling.

Callie shouted, "Fuck her little whore ass, Derrick. Fuck her while she fucks my stupid brother!" He really didn't need the encouragement. Derrick started moving faster and faster inside of Arya's ass. Arya was trembling and shaking and breathing heavily. Derrick started to groan and his dick felt fucking enormous. I started shaking uncontrollably and ejaculated hard into Arya's cunt at the same time Derricks cock unloaded. Arya, I presume, came too because the moment Derrick pulled out she peed all over the place. Or squirted. None of us could figure out which when we told the story later, and it wasn't clear from Callie's video of the incident.

At that point I figured the evening was over, and the rest of it would be me holding a completely over fucked Callie as she recoverd and slept on my last night at school. I was wrong.