Sibling Swap

*

"I think that last movie gave me diabetes," Nick said as he started going through his Dad's collection. "We need to amp things up."

"I don't want to watch anything scary," Rachel said, "Or with too many explosions. Let's choose something romantic. Or sweet."

Nick rolled his eyes at me.

"I have an idea," Lindsay said, "It's totally romantic but I bet you boys will like it too. Let's go into Dad's secret collection."

A mischievous smile grew across Nick's face. "Yes," he said, "We should totally do that."

"What secret collection?" Rachel asked warily. They couldn't mean what I thought they meant. Mr. Callahan was so... generic. Almost gender-less. Him and his wife. I'd always assumed Nick and Lindsay had been adopted. Or grown in a test tube. How could a man like that possibly have...

"Porn!" Lindsay said, triumphantly. She reached behind a false wall in the shelving and, sure enough, there was a whole stack of dirty movies waiting there for us. The collection wasn't nearly as exhaustive as the regular movies Mr. Callahan had displayed on his walls, but there was plenty more than I'd ever imagined him owning.

"The motherlode," Nick said.

"I'm not sure this is romantic..." Rachel said, but her protests were weak and she knew it. She sat down on the couch and waited for us to choose one. There were a surprising number of options here - Mr. Callahan clearly had eclectic tastes. There was girl-on-girl stuff, interracial, gang bangs. College girls with older men. Anal. Everything. A veritable smorgasbord of sexual perversion. This level of easily accessible porn went way beyond anything I'd ever imagined, let alone seen. Even the local video rental place offered far less than Mr. Callahan's private collection.

"See, now this is a vacation right here," Nick said. Lindsay smiled up at him almost beatifically. Like he'd found the golden idol and she couldn't wait to worship. It suddenly occurred to me -the two siblings seemed to know exactly where to look to find their father's collection. They'd watched these before, and not alone, either.

This wasn't some secret they'd snuck past each other, the way I imagined siblings would. Waiting till the house was empty and then watching - volume down low, just in case. This was something the two of them had clearly shared. I started to wonder what else they'd done together. The thought of Lindsay lying back on the couch and rubbing herself off while her brother was beside her tugging on his...

"Oooh, how about this one?" Nick said, holding up one with two women doing a sixty-nine on the cover. His hand was covering the title, so I couldn't see it, but I could easily guess at the content.

"Let's start with something more basic," Lindsay said, "Don't want to shock our poor friends right from the start."

"Fine, fine," Nick said. I wondered if he'd been hoping the video would convince our respective sisters to experiment. "How about this one?"

"Oh yes," Lindsay said, "It's got a little bit of everything."

It was your standard 'girl meets a bunch of guys and fucks all of them' video. I can't remember what it was called, but it was everything I'd been given to understand about porn. The bad acting, the worse music. Impossibly large dicks and lots of big-boobed bimbos.

Again, we resumed our places on the couches. I lay on my back with Lindsay between my legs while Nick and my sister did the same. After Lindsay's hand job, I thought my dick might calm down. Instead, I was already stiff from everything I'd seen and heard. My rock-hard cock pushed right up against Lindsay's tight little ass.

Unlike before, however, I didn't really worry about her feeling my dick. She'd already stroked me off, after all. Held my hard-on in her bare hands. And now we were watching porn together. So, if anything, I wanted her to feel me pressing into her private places. Hoped that maybe it would encourage her to get me off again, at the least.

Sure enough, as the movie started, Lindsay pushed her backside up against my cock. Then she slid back a bit more, making it so my erection was centered right at her pussy. We were both wearing clothes, it was just a bit of rubbing, but still it felt incredible.

The TV groaned. A woman was lying prone over a desk in an office, getting fucked from behind. We'd already gotten to the good stuff and I'd hardly noticed. Instead I looked over at the other couch, where another, somehow even more interesting show was about to begin.

Rachel was sitting between Nick's legs the same as Lindsay was between mine. I was sure his dick was just as insistent against my sister's bottom as mine was on her best friend's. They didn't seem to be humping the way Lindsay and I were. Instead, I watched as Nick slid his hands up Rachel's sides and then grabbed right at my sister's massive boobs.

I couldn't help but feel jealous, but I couldn't say of what exactly. It wasn't just that Nick was getting a feel while I wasn't. It was that he was feeling my sister. As if, for some reason, I guess I thought she should be mine.

My envy made me bold. I tried to reach my hands around to Lindsay's tits, but she just pushed my hands back. The tiny blonde kept slowly rocking on my cock, but that was all. It takes a lot of gall to have a girl bouncing up and down on my dick yet be mad that I couldn't touch her tits - only over her shirt no less - but there I was.

Then, worse, Lindsay slowly stopped rubbing herself on me. Great - I'd aggravated her right out of my action. The tiny blonde looked over at Rachel and Nick. Tried to grab my sister's attention and made little gestures with her head.

"Get on with it," she hissed between closed teeth. Rachel sort of lowered her head, resigned. She turned around, unzipped Nick's pants and took his dick out right there on the couch. She gasped as his pinkish pole popped out. Nick groaned. Lindsay giggled.

To this point we'd been fooling around in a way that could at least be somewhat denied. Always in the dark, subtly, as if no one would notice. This was right out in the open and it took things to a whole new level.

Rachel wrapped her hand around Nick's dick. It was smaller than mine - almost as long but definitely thinner with a slight downward curve. My sister started stroking it up and down. Slowly. Not being teasing - she just seemed to be struggling to get much of a rhythm. Not that Nick seemed to mind, his head lolled back on the couch. Eyes squeezed closed.

Again, the jealousy grew in my stomach. It made me really upset, seeing this. Like Nick's own sister wasn't still rubbing her shorts-covered pussy up and down my cock in that same moment. Because as soon as Rachel had started on Nick, Lindsay had returned to her own pleasure.

I just felt possessive. Over my own sister. As if the only dick she should be touching was her brother's. It didn't make sense. But I felt sick about it all the same. It didn't help that Rachel looked so hot doing it. Focused on his dick, tongue sticking out of the corner of her mouth in concentration. Her thick brown hair hanging over her hands. The way her massive tits jiggled as she worked him. Still hidden in her shirt, but still.

Maybe Lindsay sensed my discomfort because she suddenly slid off of me and spun around. Everything was out in the open now, so she went right for it - pulled my pants and boxers down in one shot till they were pooled around my ankles. My cock leapt free. Hard and purple and ever so happy to be out in the cold air of the Callahan's living room.

But he wasn't out for long. Lindsay dove down and swallowed my cock whole.

"Oh GOD!" I said. I couldn't help it. Her mouth was so warm and wet. I looked over and saw my sister staring back at me. At her best friend sucking off her brother. And, for a moment, I swear I recognized that same jealousy in her eyes.

But then Lindsay began sucking my cock with abandon and the only thing I could focus on was between my legs. Her silky, golden hair teasing at my bare skin. Tickling my balls. Her little pink mouth stretched wide around my thick, dark shaft. She grabbed the base of my dick with her hand and started jacking me into her mouth.

"Oh Lindsay. So good," I said.

"Mmhm," Lindsay said, as if agreeing with me that her mouth was pretty much the best thing in the entire universe. The little blonde wasn't interested in taking her time. She worked me like there was a timer going off behind her. Like, if I didn't cum in the next minute, she'd lose the million-dollar prize.

She had nothing to worry about. It was the first blowjob I'd ever had, my first time even near a woman's mouth. I wouldn't have lasted if she was the worst cocksucker on the planet. But Lindsay was like a cum-milking machine and my dick couldn't even handle the lowest setting.

"Lindsay," I said, trying to warn her, "I'm going to..."

"MmHM," she said it again. So casual. And then my pleasure rocketed up my shaft and right into Lindsay's mouth. I think I screamed as I did it. I don't really know because the ecstasy grabbed hold and everything went blank for a moment.

When I opened my eyes again, as my cock slowly deflated in Lindsay's hungry little mouth, I saw her gulp gulp gulp my sperm down her throat. A bit had dribbled out of the side of her mouth and she lapped that up as well. She carefully let my dick fall out of her mouth. She gave it a little pat and then smiled at me.

"You really do cum a lot," she said with a smile, "Such a good boy."

I fell back into the couch cushions and looked over. My kid sister was still slowly stroking Lindsay's big brother.

"Jeez, you're still working him?" Lindsay asked, "You're really bad at this." Rachel looked down, her cheeks red. "Alright let me help you with him."

Lindsay hopped off the couch and went over. She pulled Nick's cock from Rachel's hands and started stroking him up and down, hard. "Like this," Lindsay said, "That's how he likes it."

Lindsay was rubbing off her own brother and he wasn't saying a word. In fact, Nick looked quite content with this turn of events. And not only were the brother and sister sharing something that no siblings were supposed to do, they were acting like this was something totally normal. This is what he likes, Lindsay said, as if she knew it quite well. Familiar, in the strangest sense of that word.

Lindsay took Rachel's hand and put it on Nick's cock. The two of them now worked him up and down, in rhythm. Nick groaned lightly and arched his back.

"Going to cum," he told the girls, as if that wasn't already quite clear. His sister and my sister both started stroking faster. I saw Rachel had a little smile on her face now.

"In your mouth," Lindsay told my sister, "Just like I did for Andy."

Rachel's stroking slowed. She looked nervous again, but she shifted her body upward. Tentatively, she opened her mouth and wrapped it around Nick's dick. Nick bucked as my sister's thick, dark lips closed around his cock.

"Oh FUCK!" he cried.

Lindsay raced up to the other side of the couch and held Nick's head. Stroked his hair. "It's OK, baby," she told him, "It's OK. I've got you."

My sister started sliding her hand up and down Nick's cock, like coaxing his spend into her mouth. Nick trembled. He shook. His leg kicked out hard and Rachel made a loud, "Hmph!"

She choked and coughed, but she stayed on Nick's dick. His little sister comforted him the whole way through like he was a sick patient wracked with fever. As Nick's shaking stopped, Lindsay slowed her petting motion. Rachel sat up. Cum dribbled down her chin. Nick's dick gave one last shot and it splattered on her shirt. Right on her gigantic tit.

Rachel looked over at me and her smile sort of melted back. I couldn't help but think that she looked a little sad. Remorseful. She gulped down what was in her mouth and then she wiped her face with her sleeve. Her eyes on me the whole time. As if saying, 'I'm sorry.'

"Yay!" Lindsay said and clapped her hands. "Good job!"

The woman on the TV screen moaned loudly. We'd gotten so involved, I'd forgotten she was even there.

*

We sat around the table, eating breaded chicken and boiled vegetables with Mr. and Mrs. Callahan like it was nothing. Like their little girl hadn't been sucking my dick an hour before. As if my baby sister hadn't just swallowed their son's load.

It was so odd. Like it was all a dream. Only I couldn't figure out which was the reality. The crazed fucking around while we watched movies or this, the genteel dinner around the kitchen table.

Almost right after we'd finished each other off in front of the movie, the Callahan parents had texted that they would be getting out of work at a good time and would be home to make dinner. We quickly cleaned up, put away all of Mr. Callahan's porn, and sat down like good children in front of the TV before Mr. and Mrs. Callahan came home.

No one had much to say while we ate. I did my best to eat my rubbery chicken and hoped that no one would ask about how we spent our time. I wasn't sure I could answer with a straight face. After dinner, Mr. Callahan went into the TV room to watch a movie (something from his public collection, I assumed) and we were all shuttled off to bed. An 8:30 bedtime seemed ridiculous for a bunch of 19- and 18-year-old kids, but apparently that's how it went.

Once again, Rachel and I both brushed our teeth in the bathroom. Rachel would barely meet my eyes while we did it.

"Are you OK?" I finally asked her. She really did seem upset and it worried me. I couldn't bear it if my little sister was feeling bad, even if I'd been feeling good for the same reasons. Like I said, we were close. We had a few friends at school, but mostly it was just Rachel and me. Most of the other kids teased us for it. I knew there was a rumor that we were fooling around. At the time, I'd thought those kids were being gross. Now? Now I was starting to wonder if it was me who was wrong all along.

"I'm alright," Rachel said, "How about you?"

"I'm great," I said, "I mean. How could I not be?"

"Right," Rachel said, "Of course."

"Did you not want to...? I mean, if Nick forced you to."

"No, he didn't force me," Rachel said, "I wanted to make him feel good. I just... I'm glad you had a good time. That's all." Then she got real quiet.

Back in the bedroom, the evening sunlight leaked through the blinds while Nick softly snored, and I stared up at the ceiling. Why was Rachel so upset? When she said she wanted to do those things, I believed her. If anything, it seemed more like she was unhappy about what I had been doing with Lindsay. That didn't make a ton of sense to me either. Yes, seeing my sister fool around with Nick had made me envious. But just because I was broken that way didn't mean my sister was. Couldn't.

Nick snorted and mumbled in his sleep. Apparently, going to bed before the sun was down was just fine with him. I was wide awake. The events of the day still holding me hostage.

I couldn't believe Lindsay, the girl I'd been fantasizing about forever, had sucked my cock. Right out in the open like that, too. And then my little sister had done the same for Nick. Then the Callahans had called and... I put it together. I knew why my sister had seemed so upset.

I rolled out of bed and made my way into the hallway, quietly. I could hear Mrs. Callahan washing dishes. The dramatic music of Mr. Callahan's movie. And, distantly, I could hear Rachel and Lindsay talking again.

"... was OK," Rachel said.

"Just OK?" Lindsay asked, "Well I can tell you. Your brother? It was amazing. We just have to get you more practice, that's all."

This time, I didn't hide. I didn't listen, hoping to not be heard. Instead I walked right up to the open bedroom door. Stupidly, I knocked on the frame, like they couldn't see me standing there.

Both girls were sitting on the floor of Lindsay's room in their pajamas. Lindsay was wearing a floral, sleeveless top with ruffles on the shoulders and matching pajama pants. Rachel had on a long t-shirt with Tweety Bird on it that ran down past her knees. Both girls looked more adorable than fuckable. Though that just made me want to fuck them more.

They both looked up at me at the same time with the same shared look of surprise.

"Is it OK if I come in?" I asked. Lindsay gestured for me to enter. The whole 'no doors' thing didn't really give her much of a choice.

"I was thinking about this afternoon," I said. Lindsay gave me a wicked smile. Rachel blushed a bit and stared down at the carpet. It was purple with a big white unicorn in the center. The busty brunette traced her fingers up and down the horn.

"It was awesome, right?" Lindsay said, giving Rachel a little playful shove.

"Yes. Totally," I said, "But I realized I never got the chance to, you know, return the favor."

Both girls looked at me, eyes wide. Not with fear or anger. Something else. Excitement? Lindsay definitely looked like she was ready to burst.

"Really?" Rachel asked. Her voice oddly hopeful.

"Well yes," I said, "I mean, like, it seems only fair."

"I told you your brother was awesome," Lindsay said, "Let me guess - big, stupid Nick's already passed out, huh?"

"Yes, but, I was thinking. I mean, I wouldn't mind..."

"We'll need to be extra super quiet," Lindsay said, looking knowingly at the door, "But I'm not turning down an offer like that." Without another word, the tiny blonde shucked her floral pj pants right off. Then she took off her panties, as well and - Wow. There it was.

Lindsay's nether lips were gaping and dark purple. A thin layer of light blonde hair was on the top of her mound. So wispy it was barely there. She sat back on her elbows and spread her legs.

I looked over at my sister, expecting her to do the same, but she just blushed again.

"Do me first," Lindsay said, "Then we can deal with her." We. Oh boy oh boy oh boy.

I got down on all fours and went between little Lindsay's thin, pink legs. I could smell her scent, heady. I was raring to go. Then I froze. I'd never seen a pussy before. Not like this. What was I supposed to do?

"Start with your fingers," Lindsay said, "Feel around. Gently. I'll tell you what to do from there."

So I ran my fingers up her thick outer lips. It didn't take long for me to find her dripping, wanting hole. Right where my cock would go, I thought to myself.

"Put your finger in there," Lindsay said. I slid it into her with ease. Her little mouth almost sucked it in, I swear. Well, I could figure things out from there. After all, if my pointer was a penis it would just go in and out, in and out... So that's what I did. She felt pretty open and so I slid another finger inside. The walls of Lindsay's little pussy hugged my digits tight.

"There you go," Lindsay said, "You're a natural. Took so much longer with... Anyway, keep doing that. But now put your head down lower."

I did so. What had been a whiff of Lindsay's sex was now strong. Almost overwhelming. I did what came naturally and gave her pussy a big long lick. From the top of my fingers still buried in her hole all the way up to the bottom of her pubic bone. The beautiful blonde shivered and gasped.

"Oh fuck," she said, "Yes. OK. Use your other... Other hand. You should feel a little bump at the... fffffUCK. That's it. Yeah. Try to... To lick there. Oh. OH FUCK."

"Remember to be quiet," Rachel said, shushing her friend.

"You be fucking quiet when he's fucking... Fucking. FUCK!" Lindsay bit down hard on her lip. Her face went cherry red. She made a loud squeak. Then another.

"Hmph. HMPH!"

I kept pressing at her little nub with my tongue. Jammed my two fingers in and out of her seeping snatch. Suddenly the little blonde's whole body bucked. Her chest thrust upward. Froze. Then she fell back to the ground panting. Gasping for air.