Sibling Swap

"Don't know about what?" Lindsay asked.

"The whole brother-sister thing. I just..."

Lindsay rolled her eyes and groaned. "Hang on," Lindsay said. She reached up and paused the movie. Then she grabbed Rachel's hand and dragged her out of the room. It sounded like they'd gone back to the kitchen.

I could hear Lindsay talking to my sister, sternly. Like I said, no closed doors. Still, I couldn't make out exactly what they were saying. Nick grinned at me and nodded his head for me to follow. Quietly, we stepped out of the TV room and tip-toed over to where we could hear the whole thing.

"...so, yes, you do," Lindsay said.

"I'm just not sure I feel comfortable," Rachel said.

"You seemed plenty comfy last night," Lindsay said. Nick shot me a querying look, but I just shrugged at him. Hopefully looking innocent. "And this morning, too."

"No, I know. It's just..."

"Just nothing. Otherwise it isn't fair."

"Come on Lindsay, he's my brother. I shouldn't be doing that stuff with my brother."

Nick gave me a dark look. Competitive. As if to say, 'see, my sister is way better than yours.' I didn't say anything. Rachel was right, of course. One-hundred percent. Siblings were not supposed to do these things. But it didn't stop my heart from breaking a little as she said it.

"Fine," Lindsay said, clearly exasperated. Then she started whispering. I don't know whether she knew we were listening or only suspected. Or maybe she wanted to make Rachel feel intimate and safe. Either way I couldn't hear a thing.

Then Rachel said, clearly, "Yes. I can do that. Thank you, Lindsay. For understanding."

"Of course," Lindsay said, "I'm your best friend. I'll do anything to make you happy. Now let's go back to the TV room and tell the boys."

Nick and I ran back from the kitchen door and sat down on the couches, like we'd been there the whole time. Lindsay sauntered in soon after, Rachel in tow. My big-chested little sister looked bashfully down at her feet. She was still fully dressed in shorts and a cami. Lindsay, though, was down to a light blue bra with matching panties. They looked so good on her, I couldn't wait for her to take them off.

"Thanks for waiting patiently in here, boys," Lindsay said, "Rachel and I have come to a solution we can all be happy with. Right Rach?"

My sister nodded. Her face was still pinkish.

"We're going to play Mirrors, like before," Lindsay said, "But like before, we're going to pretend."

"I don't understand," Nick said. Lindsay rolled her eyes at her brother.

"No kidding, numb-nuts," Lindsay said, "You didn't even let me explain. We'll just pretend to be siblings this time."

"So, you'll be with Andrew," Nick said, "And I get to be with Rachel?" He didn't sound too unhappy about that. Especially the him and Rachel part.

"Exactly," Lindsay said, "But because we're doing Mirrors you'll act like she's your little sister and I'll get to play that Andy's my big brother."

Huh. That sounded kind of hot, actually. All of the danger and none of the consequences. I had to admit, I was impressed with Lindsay's ingenuity. I wondered if people could get college scholarships for sex. If that was the case, the little blonde deserved a full ride to Harvard. Actually, as I thought about it, I remembered that Lindsay really did have a full ride to Harvard. So, there you go.

"Everyone OK now?" Lindsay asked. Nick bobbed his head up and down like he was a giveaway at a baseball game.

I nodded more demurely. Like I said, I was impressed by Lindsay's solution. But I couldn't help but be a little disappointed, too. It worked. It really did. And anything that encouraged Rachel to keep going should have been enough for me. Besides, only a crazy person would be upset about losing their little sister when they had the lovely Lindsay waiting for them. Too bad I was certifiably insane.

Lindsay walked over to me, still in her underwear, and held my hand.

"You're looking a little overdressed there, big bro," she said.

I smiled. The way she said it, I mean, whatever my erection had lost from before, it shot right back hearing her say those words. Clearly the sibling thing got me going. Even if it wasn't my actual sibling.

"Right you are, little sis," I said. I pulled my shirt over my head. As I got undressed, I did my best to get my mind in the right mood. I pictured Lindsay, younger, living in my house with me. Saw her at my birthdays. Going to the mall together. All that stuff. But, of course, it wasn't hard to imagine at all because Lindsay had done all those things. As my little sister's best friend.

But now I switched the narrative in my brain and said, no, she was your sister at your birthday party. She was your sister when you went to the mall. All the other things that Rachel had done, I just swapped in Lindsay instead. Lindsay bandaged my knee when I fell off my bike. Lindsay hugged me tight and let me sleep in her room the day Dad yelled at me for breaking the coffee urn.

I dropped my pants to the floor and smiled. "Better, little sis?" I asked.

"Oh yes," Lindsay said, eyeing me up and down, "Much better."

I looked over and saw that, like us, Nick and Rachel were now down to their underwear. I didn't know if either of them had done the same mental exercise. In that moment, I didn't care. I was going to have my cake and eat it, too. I was going to get to be sexy with my sister without committing incest at all. Perfect world in pretend.

Lindsay picked the remote up from the couch and hit play. The TV siblings were still sitting on the bed, looking at each other longingly. Lindsay and I mirrored them on the couch. I didn't look over at Rachel. I made myself stay focused.

Then TV brother leaned over and kissed TV sister on the mouth. Tentative and soft. As soon as they made contact, they jumped back like they'd been sparked. Then TV sister nodded, and her brother kissed her again. This time more passionately.

I looked over at Lindsay and we did the same. First the quick kiss. Then the long, loving one.

"It's OK to talk," Lindsay said to the room, "If it, you know, helps. With the pretending."

Then we went back to kissing. Lindsay pulled back a bit so she could speak. "It feels so good kissing you big brother. I've wanted to do this for a long time."

"Me too," I said. Everything I understood tore and rewove itself in a pattern I could no longer recognize. Lindsay spoke like she really meant it. But was she saying it for Nick, as his sister? Or was she telling me? Or maybe she was pretending to be Rachel and saying something that she knew was true for my little sister. And then, what did my response mean? Because all of those things were also sort of true for me and also not. Fuck. It was all too much and so I let the fantasy envelope me before I thought myself right out of it.

The couple onscreen were still kissing. More passionately now. Tongues in each other's mouths. All sense of control clearly lost.

Lindsay kissed me the same way, like putting our lips together was far more important than breathing.

"I love my big brother's strong arms," she said.

"I love my little sister's tiny tits," I said.

"So, do something about it," Lindsay said. I looked up and saw, sure enough, that TV brother had lifted off TV sister's bra and was now gently rubbing her breasts. I tried to undo Lindsay's bra strap but I made a mess of it. Finally, she sighed and reached back, freeing her boobs for me.

Matching my on-screen mirror, I tentatively traced Lindsay's tits. I heard my sister - my real sister, Rachel - gasp and I looked over. Nick was taking the video as merely a suggestion and had started mauling my sister's massive mammaries. Rachel looked a little uncomfortable, she kept shifting slightly, but she didn't step away.

"I love your tits, sis," Nick said. I swear, I heard Lindsay grunt a little when he said it. I turned my attention back to my own pair.

"He doesn't know what he's missing," I whispered in Lindsay's ear. "I know I'm the luckiest brother there is. My little sister was made for me."

Lindsay kissed my lightly on the cheek and leaned forward to let me get a better grip. Then she reached down for my boxer shorts. The girl on screen was doing the same. Lindsay clearly had this timed to perfection. I might have thought about it more - was this something she'd watched on her own? With Nick? Had they, too, played the Mirrors game this way? - except there was a gorgeous blonde, you know, grabbing for my cock.

Lindsay slid my boxers under my bottom and my dick leapt out. Clearly, he knew to pay respects to his golden goddess. Lindsay oohed and clapped as my cock appeared. She reached out and grabbed it with far more excitement than the hesitant touching TV sister was giving to TV brother.

Not that I was complaining.

"My big brother has a biiiiig cock," Lindsay said.

"Oh. Me too," Rachel said. I looked over and saw that Nick was giving his pretend little sister a death stare, waiting for her to return the favor. "I'm a lucky little sister," Rachel continued. She said it in a way that was not very believable. I'd seen daytime cable movies with better acting. But Nick seemed perfectly pleased and he smiled at both me and Lindsay like he'd won the big prize.

Lindsay daintily traced her fingers up and down my cock, much in the same way that I had lightly touched her boobs. It wasn't exactly the same nervous fondling the TV siblings shared, but the result was the same. Lots of teasing with little result. I kept my eyes focused on the TV screen, waiting for the inevitable next step.

Sure enough, TV brother reached over and pulled down TV sister's panties. I did the same to Lindsay, exposing her little blonde bush.

"Geez, Rach - I mean, sis - you're really hairy down there," Nick said, "You ever think about shaving it or something?" Rachel blushed deeply and looked away. Maybe talking wasn't such a good idea after all, if this was all he could think of to say.

"You're not being a very good big brother," Lindsay said, "You're supposed to support your little sister."

"Oh, sorry," Nick said, "Don't worry little sis, I'll help shave your cooch for you."

Lindsay rolled her eyes and sighed. I reached over and found her pussy. Teased at it with my fingers. Both TV siblings had their hands in each other's sexes and so the two pretend sibling couples were doing the same on the couches in real life. Lindsay lightly stroked my cock while I played with her parts. Rachel clumsily pulled on Nick's penis while he jabbed at her cunt.

"That feels... really good. Big bro," Lindsay said. If she was acting, it was a hell of a job. Her eyelids half shut, hair tossed back. Her cock rubs were becoming more and more erratic. I heard a wet, slurping noise come from the TV.

"Finally!" Nick said. He let go of Rachel's snatch and lay back. He grabbed his cock and sort of wiggled it at his pretend sister.

The on-screen siblings had, indeed, progressed to sucking. TV little sister took her brother's cock in her mouth and she licked it top to bottom, looking up at him the whole time like in supplication. Is this good? Her eyes seemed to be asking.

Lindsay pushed me onto my back and then took my cock into her mouth. One big slurp and I was completely contained, her tongue pressed tightly to the underside of my cock. I could hear my sister making little choking noises to my left, but I simply couldn't pay attention while little Lindsay licked me. God, I'd been in her mouth several times now, but I still couldn't get used to how amazing it felt.

Lindsay reached down and cupped my balls. Used her fist to work my cock. I didn't know if this was how TV sister was doing it and, frankly, I didn't care.

"My little sister is sucking my cock so good," I said.

"Mmhm," Lindsay said, happily. She pulled off my dick for a moment, "I love my big brother's big dick." She gave me a couple of corkscrew strokes and then dipped her head back down.

I could feel my orgasm getting close and I wasn't sure what to do. I didn't think TV brother was about to cum, but at the same time I didn't want to miss my opportunity to blow my load if I could. Lindsay knew the video by heart it seemed - if it was my time to cum, would she tell me?

Then, just as I was about to let it go and, you know, let go, Lindsay sat up. I saw on the screen that TV sister had done the same. Nick didn't give Rachel the same courtesy. My dark-haired sister was still sucking him up and down. Her hand on his shaft. It was clearly pretty sloppy. Rachel wanted to please, I think, she just lacked the experience. I was obviously the recipient of a far better oral performance. Yet I couldn't help but be envious - wishing it was my cock in my actual sister's mouth.

Lindsay cleared her throat loudly, "You can stop now," she said. Rachel looked up and saw the TV screen. She gave Nick a dirty look, but he smiled and raised his shoulders as if to say, 'who me?'

TV brother now reached over to TV sister and pushed her onto her back. Well, I knew this was coming. Time to return the favor. But he didn't put his head between her legs. At least, not the head I was expecting.

Instead, TV brother climbed between his sister's legs so that his penis pressed against her pussy. He leaned forward and kissed his sister on the lips, holding his cock in one hand and lightly stroking it against her sex.

Then the onscreen sister's eyes went wide as her brother slid his shaft right into her steaming snatch. Both siblings kissed again. They were connected as closely as they ever could be. As siblings never should. TV brother slowly pulled back and then rocked forward.

"Come on, big brother," Lindsay said, "Give it to me. Give that big brother cock to your little sister's pussy. She needs it so bad." The little blonde was lying back on the couch, legs spread. She had her hand over her snatch, lightly stroking it. She looked at my dick. Up at me. Grinned.

I took my cock in my hand and aimed it at Lindsay's pussy. This moment I'd dreamed about with the girl I'd dreamed of doing it with. Oh my God. I didn't even think about the fact that Lindsay's brother was about to do the same thing to my little sister. Then suddenly the image on the screen froze.

I looked over. Rachel was holding the remote in her hand, standing there. Nick lay on the ground looking a bit dazed. Lindsay groaned. She kicked her legs out.

"I'm not ready for that," Rachel said. She looked resolute. If Rachel didn't want to fuck that was fine. Better than fine, honestly. Ideal. But I was about to get laid here, sis! Help a brother out! I waited for Lindsay to make her unbeatable argument like always.

But Lindsay didn't make any argument. She didn't drag my sister off or tell her she had no choice. Instead the little blonde girl ran her hand through her hair and smiled, kindly.

"Let's just pretend," Lindsay said, "We're pretending to be siblings, we can pretend we're having sex. That's easy." She didn't even seem upset.

"I don't," Rachel said, "I mean. How do we pretend?"

"Well, it's like you told me before. About the shower head," Lindsay said. Rachel gasped, embarrassed, but Lindsay kept going. "Only, instead of using the water, you're rubbing it on a cock. Here, we'll show you."

Lindsay lay back with her legs spread again. She motioned for me to lie down on top of her. As I did, she reached up and pushed my cock down so it was resting right in her nest. I could feel the warmth of her sex. The slickness. I wasn't inside her. My cock was right on top of her pussy though and it felt great. I had the urge to grind down, instinctual. I did and my mind almost went blank. This felt... amazing. I mean, it wasn't sex but...

"Oh God," I said.

"That's a good boy," Lindsay said. She pushed her pussy up into me at the same time. We both trembled for a moment, then stopped. "Just keep doing it. Like that."

Nick lay down on his back and Rachel climbed on top of him, like she was about to mount him. Then she pushed his penis down and dragged her pussy over it. She lay forward, like I had done, and I could see her pressing. Her little bum wiggled. Her arms and legs outstretched. She shook a bit, then she let her head droop.

"Ahhhhh," Rachel said.

"Right?" Lindsay said, "Don't forget to pretend." I ground down into Lindsay again. "Oh my big brother is fucking me so good!"

"Your pussy," I said, "Feels amazing."

"My brother," Rachel said, "My brother's fucking me."

"How about it, Nick?" Lindsay asked, "You like fucking your little sister?"

"Yes, it's awesome," Nick said, flatly.

Lindsay and I were getting into a bit of a rhythm. I pushed down with my penis and she arced her back to respond. I guess my cock was right on her clit because it really seemed to do something for her. It certainly did something for me. I felt like I was only a few pushes away.

"Oh," Rachel said, "Oh." Her face was really red from the exertion. Sweat slid down her cheeks. She pushed down hard and her body started to really shake and then "AhhhHA!" she cried. Her back arched a bit and then she fell forwards.

"You cum?" Nick asked.

"Little bit," Rachel said.

"Good," Nick said. He slid out from under my sister. "Good."

I pressed my whole body into Lindsay one last time. The pleasure exploded out of me. I felt a warm spurt hit my leg. Another.

"Oh!" Lindsay said, her chest flushed, eyelids fluttering. "My brother. My brother's cumming in me. Oh, big bro you shouldn't but... It's OK. Give it to me. Ohhhh, so good."

It was an odd release. Stilted. Still so nice. Lindsay giggled and hugged me tight. She reached up and patted my head as the last of my pleasure leaked out onto the couch.

"Thanks big brother," she said and kissed me on the forehead, "You did such a good job fucking me. Filling my pussy with your sibling spermies."

When I felt like I could move again, I rolled off Lindsay. Looking down, I saw her thin pink legs were spattered with my spend. I worried that I might have gotten some on her pussy - all pretending aside I didn't think she was protected - but I was pretty sure I'd missed her target. Lindsay stood up and got some tissues. She wiped off her legs and then cleaned my splooge off the couch.

Nick stood and watched, his penis pointing at his little blonde sister. Almost accusatory. He grabbed the remote and stopped the movie. The siblings were still fucking. The sister on top of her brother. Her face twisted in pleasure.

I looked down and saw Rachel, still sitting on the floor. She was crying. I assumed it was her post-orgasm response, as always. She stood up, grabbed her clothes, and stomped out of the room.

Lindsay frowned at me and then went after my sister. She didn't even bother to dress and her little tits jiggled back and forth as she left. Without a word, Nick left the room, as well. Naked as his sister. I heard him tromping up the stairs and assumed he was going up to his bedroom.

It was just me, then, sitting on the couch by myself. Clothing all over the floor like a linen grenade had gone off. I started to get dressed again. For a moment, I considered putting the movie back on. I wanted to know how it ended, like there was going to be some big twist instead of, you know, the expected. Still, I wondered if the brother filled his sister with his cum or if he pulled out and covered her in it. I couldn't decide what would be hotter.

Certainly, jizzing all over his sister, marking her - on her cute face and little titties - that was sexy as fuck. But then I thought, I bet she's not on the pill. He wasn't wearing a condom. If he came inside her and knocked her up... I don't know why that turned me on so much, but it did. Siblings together was so wrong on its own. The idea of him making a baby in her...