The Window

Roger and his family moved into the house next door when we were both ten years old and we've been best friends ever since. I've always thought that we were like mirror images: we sort of look the same, although I have dark hair and he's blonde; we both have one sister, they're each a year younger than us; we have normal, boring parents who are practically interchangeable; even our houses look alike, a pair of large, squarish, two-story homes in the middle of a crowded street. But if we are mirror images, Roger is the real one; I'm the reflection. He leads, I follow.

He seems to speed through life without effort; I can only plod along behind him at my own pace. While this is true about everything we do, it's especially true when it comes to women - he is more experienced than I'll ever be. We're nineteen years old but Roger is like a wise and dirty old man. He's always telling me stories and giving me advice. Sometimes he even lets me watch.

There's a large window in my bedroom, which is on the top floor of my house; by coincidence it is exactly opposite to the window in Roger's bedroom next door. When we were kids we discovered that, due to the shape of our houses and the distance between them, nobody else could see into our windows, either from the ground or from any other window. It was a secret connection between us, and it was pretty cool when we were kids; when we grew up, it was Roger's idea to leave his curtains open and his lights on when he had a girl in his room. It didn't happen that often, since it was usually hard for him to sneak a girl into his house, but when Roger would tell me that the possibilities were good, that night I would be in my room, lights out, sitting by my window, watching.

A few weeks ago, as I was getting ready for bed, I realized that this hadn't happened in a long time. I thought that maybe we had forgotten about our arrangement; Roger hadn't mentioned it lately, and I hadn't asked. I couldn't even remember the last time I had looked out my window, I almost always keep my shades down. So that night, just for the hell of it, I pulled up my shades.

Roger's curtains were open and his lights were on. He was with a girl. They were both naked. He was sitting on his bed and the girl was sucking his dick.

So Roger hadn't forgotten about our windows. But why didn't he say anything to me? His curtains would be closed if he didn't want me to watch. Did he want me to discover this on my own? I wondered what he was up to.

The girl took Roger's dick out of her mouth and stood up. That's when I saw her face - it was Becky, Roger's sister.

Holy shit. He was having sex with his sister. And he wanted me to see it?

I've always considered Becky to be pretty hot; I also considered her to be off limits, being Roger's sister. How's that for irony? She has long blonde hair, a thin waist, and rather big breasts. She's good friends with my sister Rachel. I wondered if Rachel knew anything about this. I wondered how long it had been going on. I wondered why, dammit, why was he having sex with his sister? It was completely unexpected.

Becky climbed onto the bed, on her elbows and knees, her ass in the air. She was looking at the window, her face resting against the mattress, almost looking straight at me, but my room was dark, she couldn't see me. Roger stood up behind her and slowly eased his dick into her pussy. Becky closed her eyes and arched her back, her tits brushing against the sheets.

"What are you doing?"

I jumped. It was Rachel, standing in my doorway. I had forgotten to close my door.

"Uhh," I said, like an idiot. My sister must have passed my room on her way from the bathroom; she was wearing a long shirt, ready for bed.

"What are you watching?" she asked, walking into my room.

I should have pulled down the shades then. I could have easily pulled them down before my sister saw anything. I didn't. I'm not sure why.

Rachel stood next to me by the window. "Oh, it's Roger," she said, not impressed. "He's such a horndog." She laughed and poked me in the shoulder. "He opens his curtains so you can watch? That is so sick!" Then she looked closer. "Wait - that's Becky! He's fucking his sister!"

"Sshhh," I said, but there was no way our parents could hear us; their bedroom was downstairs on the other side of the house.

"What the hell are they doing?" she said. "How can they do that?"

I shrugged in the dark. "I don't know."

"How long has this been going on?"

"I don't know! This is the first time I've seen them do it," I said.

"It's disgusting," she said. But she didn't leave; she just stood beside me, watching.

Roger was getting into a rhythm, one foot on the bed, the other on the floor, pausing before each thrust, his dick nudging against her pussy, then sliding it in, burying his dick, and then slowly inching it out. Becky gripped the side of the bed, throwing her head back with each stroke, her body shuddering, looking like she was holding back a scream as her brother slowly fucked her.

"How can they do that?" Rachel said quietly.

Roger suddenly pulled out and flipped Becky onto her back. She smiled as Roger stretched himself over her and kissed her. He kissed Becky's breasts, holding them in his hands, squeezing them together. She wrapped her legs around Roger's back as he sucked her nipples.

"It's so sick," my sister said.

Roger sat up, his hands on Becky's knees, holding her legs open. He said something to her, his dick bobbing over her pussy. Becky had a blush that was creeping down her chest. Roger kept talking to her, pushing her legs wider, running his fingers along the inside of her thighs. Becky answered him, nodding her head, biting her lip. Finally Roger stuck his dick into her pussy. Becky opened her mouth wide; Roger clamped his hand over her mouth, stifling her scream, and he didn't miss a beat, his hips thrusting faster and harder than before.

"I suppose this is turning you on," my sister said. I looked at her in the dim light; she had a hand between her legs.

Everything suddenly clicked into focus.

I was standing beside my sister. I was wearing only a pair of shorts. She was wearing a long shirt, her legs bare. We were watching a brother and sister having sex. And my sister was touching herself.

My cute sister, her face lit by the glow next door, her body inches away from me. My dirty sister, rubbing her pussy, excited by what she was seeing.

I knew what was going to happen. Was this what she wanted? Was this what I wanted? I felt like it was all out of my control.

She leaned against me. I could feel the heat coming off her body. Her eyes never left the window. I put my arm around her waist. She melted against me, both of us facing the window, her hand still between her legs. She rubbed her body against the hard lump in my shorts.

"Look at Becky," Rachel whispered. Becky had her legs wide, her arms over her head as Roger humped her. "Look at how much she likes it." Becky was thrashing under Roger's body, a look of wild pleasure on her face. "She's such a slut."

I slid my hand underneath her hand and pressed down. She moaned, her body shaking. She lifted her shirt. I was rubbing her through her panties, I could feel how wet she was. She took off her shirt. I cupped one of her breasts. She leaned back into me. Her body was so warm. She reached into my shorts. I felt her hand wrap around my dick. I slipped my hand into her panties. My fingers circled her pussy as she stroked my dick.

"Maybe she's always wanted to fuck her brother," my sister said.

I took off her panties. Rachel leaned forward, put her elbows on the window sill. I dropped my shorts. She spread her legs. I had to lift her off the floor to reach her pussy. She propped her knee on the dresser next to the window. I held her other leg. She was spread wide open, suspended over the floor. Her whole body was vibrating. I slid my dick into her pussy.

She was tight and wet. I sank my dick all the way, filling her pussy. It felt incredible, my dick throbbing in my sister's pussy, my hands holding her body. Rachel was breathing hard, fogging up the window, but I could still see out, I could see Roger fucking his sister. He was going fast, pounding into Becky; I was going slow, I fucked Rachel gently, with long smooth strokes, her pussy squeezing my dick. Suddenly Roger sat up, his dick in his fist; he came all over Becky, spraying her breasts and her gasping face. I went on, thrusting into my sister, going a little faster now, rocking her against the window. I watched Roger and Becky; she was licking come from her face, he was feeding it to her with his fingers. The pressure was building, I was going faster, Rachel was moaning, she was getting hotter, wetter, and I couldn't last much longer. I saw Roger get up and walk to his door; he peered out his window, as if he was checking up on me, then he turned off his lights. The darkness hit us and I exploded, I pulled out of Rachel and shot my load, my dick pumping over her back. Rachel's hand flew to her pussy, bringing herself off, and I put my hand to her pussy too, our fingers slipping over each other, her pussy overflowing, her body squirming in my arms, a scream in her throat, until it was finally over, and she settled down, relaxed.

I set Rachel down on the floor. She was panting, still bent over against the window. I took an old shirt of mine from the floor and wiped off her back. Her breathing slowed. She gathered her shirt and panties and stood up.

"This never happened," she said, her back to me. "Just...never mention it, ok?" She walked halfway to the door, then stopped and walked back. She stood in front of me in the dark, touched my face, and lightly kissed me. "It was pretty good though," she whispered, and she left.

It was a long night. I replayed what happened over and over in my head, but I couldn't understand it. I had to agree with Rachel - it was pretty good. But what had we done? Was it a huge mistake? How would this work out? I didn't know how things would go from here. I figured I would just have to talk to Roger.

The next morning Rachel wouldn't even look at me; she quickly finished her breakfast and left early for school. I had some time before I had to leave for work, so I waited for Roger outside his house. He acted normal as he came out; I acted normal as I greeted him. Everything was perfectly normal - except for the bizarre secret that both of us held.

Roger worked on his car that morning. I hung out in his garage, looking around, making sure nobody could hear us. I was also trying to decide what to say. Finally I just blurted out a question.

"How long have you been fucking your sister?"

"Aha!" he said, pointing his finger at me and grinning. "You finally saw us. Took you long enough. We've been doing it for a week or so."

"And you wanted me to see it?"

Roger laughed. "Why not? I told Becky that you're the only one who can see in my window. She gets really excited thinking you might be watching."

"But why are you having sex with your sister? How did it start?"

"I don't know - it just happened. We were home alone one night. One thing led to another. And man, let me tell you, it's the best sex I've ever had."

I sighed; I knew what he meant.

"Hey, don't tell me you don't approve," Roger said, misunderstanding my reaction. "We're just having fun. It might be immoral, but that's a lot of bullshit anyway. There's nothing wrong with what we're doing."

"I just don't know what to think," I told him.

He shrugged and went back to working on his car.

"My sister saw you too," I finally said.

"No way! What did she say?"

"It wasn't so much what she said." And I told him about last night.

"Yes! Yes!" he said, pumping his fist. "I knew it! I knew you would get the idea once you saw us."

"It wasn't my idea. It was Rachel's. I think."

"How was it? Was it good?"

I thought about last night, as I held her off the floor, as I slipped my dick inside her, as I made love to my sister. "It was unbelievable," I said.

"Oh man, I have to tell Becky."

"No, no, no, no," I said. "No way. Rachel will kill me."

"Hey - don't worry. Whatever she said last night, she'll want to do it again. She'll be back in your room tonight, I'm sure of it. Have your lights on and your shades up. Tell her that you told me all about it, and that I told Becky, and that we're watching from our window. You'll see - she'll be all over you."

It was all true, everything he said - how does he know these things? I didn't see Rachel that afternoon, and she avoided me all evening; later that night she slipped into my bedroom. I was sitting on my bed with the lights on; she saw the shades up in the window, and she understood. She closed her eyes for a moment, leaning against my door; then she took off her shirt. She was completely naked underneath. She was so beautiful. She came up to me and sat in my lap, straddling me.

"Let them watch," she said in my ear.

We kissed, our first real kiss. She worked off my shorts as our tongues slid together. I leaned back as she lowered herself onto my dick. She rode me, her hands against my chest, bouncing up and down on my bed. I touched her stomach, her breasts, her face, amazed by my sister, wondering why I had never noticed how truly beautiful she was. She never looked at the window while we were doing it; I looked at it once, but I could only see my reflection, and the reflection of my sister on top of me. We were in our own world, a timeless world, her body endlessly moving over mine. Eventually she started coming, started squealing, started bouncing faster, and I tried to hold on, my dick sliding in and out of her gushing pussy, holding back until she was finished, but it went on and on, she was coming over and over. Just when I couldn't take any more she jumped off me, put her lips around my dick; I came immediately, flooding her mouth, her tongue milking me, draining me, and she swallowed every drop. I rolled my sister onto her back and opened her legs, licking the juices from her pussy. She whimpered as she came once more.

"This is really strange, isn't it?" I asked her afterwards. We were lying on my bed; the lights were still on, I was too tired to get up.

"Yeah, you could say that," Rachel answered. "I had a long talk with Becky today. She kept telling me there's nothing wrong with what we're doing. I'm sure that's what her brother told her." She turned to me and said, "I swear, Roger is a bad influence on some people."

Some nights it's Roger and Becky with their lights on, other nights it's Rachel and me. It's been going on like that for some time now. The sex has been incredible, but I'm still not sure how things will work out. I mean, what about the future? We can't keep doing this forever. I don't know - maybe Roger will think of something.