Hi everyone, I’m Dave. I come from a family of seven kids, and I’m the second oldest. My sister Sarah is the third oldest—she’s eighteen months younger than me. Out of all the siblings, we were the closest. We did everything together: played games, talked, told secrets, made pinky promises, and just hung out.

I moved out of my parents’ house into my own one-bedroom apartment when I turned 18. Sarah got married at 17 and soon got pregnant. Her husband went into the military, so she moved in with me. She thought it would be less stressful than staying at home in that small house with Mom and Dad constantly bitching at her.

She was around four months along when she started complaining about how uncomfortable the couch and floor were. Being a good brother, I offered to let her take the bed while I slept on the couch. She insisted we could both sleep in the same bed like we did when we were younger. “It’s not like we haven’t bathed together and gotten dressed around each other before,” she said. I agreed, even though we were much younger back then. We’d both grown since, but it was a queen-size bed with plenty of room… or so I thought.

A couple of weeks went by. It was mid-summer and hot as hell. Air conditioning was a luxury we didn’t have, so all I had was a noisy metal fan. I came home from work exhausted, took a cold shower, and had a beer. Sarah was already in bed under the fan wearing a thin nightgown—the kind that covered everything but still let you see right through it. Her C-cup breasts, half-dollar-sized areolas, and pencil-eraser nipples were clearly visible. She’s only 5 feet tall and weighed about 105 pounds soaking wet, with sandy blonde-brown hair.

I climbed into bed wearing boxers and a t-shirt. A couple hours later I woke up sweating, so I stripped everything off. After cooling down a bit, I pulled the sheet up over my midsection and fell back asleep.

Around midnight I woke up again. The sheet was on the floor—Sarah must have kicked it off. I looked over and saw she was completely naked. Her body looked incredible: full C-cup breasts, a growing baby bump, and a cleanly shaved pussy with puffy lips. Her legs were slightly apart. I felt myself getting hard. I’m not huge—just an average 7 inches, thick, with a slight upward curve—but I was too hot and tired to do anything about it.

At about 4 a.m., I felt her snuggling up close. Her hand resting right above my cock. I was naked next to my sister, her nipples pressed against my side, her breath on my neck, and her leg draped over mine. My hand was inches from her pussy. I told myself not to get excited, but it was too late—I was rock hard.

Then she moaned softly in my ear like she was having a wonderful dream. I froze. My mind screamed to wake her up, but my body wouldn’t move. A moment later she reached down and wrapped her hand around my cock. My heart nearly stopped as she started stroking me slowly.

“Someone wants some attention,” she whispered.

At this point I was thinking she must still be sleeping. There was no way she would do this if she was awake. I was really getting excited. I could feel my balls aching and precum oozing out. I don’t know what came over me, but I started to enjoy it. My fingers drifted down to her pussy and began massaging her clit, running up and down her very wet slit.

She started breathing heavier and stroked me faster. I was losing any will to stop. Then it happened so fast—she slid on top of me and took my cock inside her in one smooth movement. I heard her suck in a deep breath, her face still buried in my neck. She slid up and down a couple of times, then sat there balls-deep. God, she felt so wet and snug. I could feel her vaginal walls massaging my cock.

That’s when she whispered, “God, you’re so much bigger than my husband.”

The light went off in my head—she knew exactly what she was doing. At that point I didn’t care anymore. I needed to cum. She started riding me, moving up and down. We were both breathing heavy, our skin slapping together faster and faster. Then she came hard, shaking and screaming, “Fuck! Oh my God, you’re so big!” She kept riding me until I couldn’t take it anymore.

I flipped her over, pulled her legs up by her ears so her pussy was aimed straight up, and started slamming into her as hard as I could. I wanted to punish that pussy for teasing me. Full strokes—slam, slam, slam. You could hear how wet she was and the loud slap of skin on skin. She was moaning and screaming, “God, fuck me! Fuck me harder! I want you to come inside me, big bro!”

I drove in as deep as possible and exploded, pulse after heavy pulse. It was one of the best orgasms I’d had in years. I was exhausted. When I finally pulled out, my cock gave one last twitch and shot the final rope of cum onto her stomach. I rolled onto my back, breathing hard.

After a few minutes I sat up on my elbows. She was still breathing heavily, her breasts rising and falling. I looked down and saw my cum oozing out of her pussy. We just stared at each other without saying a word, then laid our heads back down and slowly drifted off to sleep.

I woke up to the sound of my alarm clock. Sarah was already out of bed and showered. The smell of bacon and eggs filled the apartment. I was starving. I got up, showered, and wondered how I was supposed to act around her. Would she be mad? Happy? Guilty? Did I feel guilty? What the fuck was wrong with me? I decided I’d deal with all those feelings after breakfast.

I walked out dressed for work. She had my plate ready with a cup of coffee. We ate across from each other in complete silence. I didn’t know what to say. All I could think was that it was an amazing fuck, but I figured I should let her make the first move.

I couldn’t concentrate at work at all. Why didn’t she say anything at breakfast? Was she going to tell anyone? If she did, it would ruin the whole family. Two more hours and I’d be home.

When I got home, no one was there. I started worrying she was mad or disappointed. I checked her stuff—everything was still there. I breathed a sigh of relief, grabbed a beer from the fridge, and saw her note: “I’m at Sally’s. Be home late.”

It was cooler that day with a storm coming in. I showered, ate leftovers, and crawled into bed naked. I hate wearing clothes to bed in the summer, and I didn’t think Sarah would be home anytime soon.

At three-thirty in the morning, a loud bang of thunder woke me. Rain was pouring down. Then the bedroom door opened. I nearly jumped out of my skin. Sarah stood there soaking wet.

“Sorry, I didn’t mean to wake you,” she said. “I’m going to shower and change out of these drenched clothes before I get sick.”

I dozed back off. A little later I felt her sneak into bed and snuggle up against me. I could feel her hard nipples rubbing on my skin. I reached over her body and realized she was naked. I opened one eye.

“I don’t know what to say about last night…”

She replied, “What? Didn’t you like my pussy? Because I loved your cock in me. I was hoping we could fuck again. It’s not like you’re going to get me pregnant—I already am. We both need relief, and I’m horny all the time being pregnant.”

I agreed. She was right.

“Okay, get on your knees. Let me fuck you from behind.”

“Oh really?” she said. “I’ve never tried it that way before. But don’t you want to eat my pussy first?”

I got between her legs, kissed her pregnant belly, and slowly worked my way down to her smooth pussy. I spread her puffy lips apart with my fingers and took a deep inhale, savoring that sweet, musky scent. Then I ran my tongue over her clit while my other hand reached up to massage her C-cup breasts and play with her nipples.

I must have been doing something right, because she started moaning, squirming, and arching her back. Her body tightened up and she suddenly shook, flooding my chin with her juices. “Oh my God!” she yelled. She grabbed my hair, pulled me up, and kissed me hard—not like a sister, but like a lover. It was a deep, wet, juicy French kiss.

While we kissed, my rock-hard cock rested right against her soaked pussy. I could feel the intense heat radiating from her, making me ache. I couldn’t wait any longer. I broke the kiss, grabbed her by the waist, flipped her onto her stomach, and lifted her hips so she was on her knees with her face down on the bed.

I positioned myself behind her, ran my fingers down between her ass cheeks to her dripping pussy, and coated the head of my cock with her juices. I rubbed the tip up and down her slit, teasing her clit, then lined up with her tight little hole. I pushed the head in, pulled it back out, and repeated the motion—teasing her until she was pushing back against me, desperate for more.

Finally, I slammed all the way in, balls-deep. My balls slapped against her clit as she sucked in a sharp breath and moaned, “Holy fuck, you’re big!”

I started pounding her hard, excited beyond control. Every thrust felt like I was punishing her sweet little pussy. She growled like a wild animal in heat, pushing her ass back to meet me. “Fuck my pussy like you own it!” she screamed. “Keep going, don’t you dare fucking stop!”

The sound of our skin slapping together filled the room—slap, slap, slap—mixed with the wet, squishing noises of her soaked pussy. My balls bounced against her with every thrust. I kept pounding harder, my legs burning, but I didn’t care. I was lost in it.

I couldn’t hold back any longer. I slammed in as deep as I could and held it there, exploding inside her. Pulse after heavy pulse, I filled her with cum. At the same time, her pussy tightened and started milking my cock as she came hard.

I stayed buried inside her for a long moment, savoring the feeling. When I finally pulled out, her pussy stayed gaped open, pulsing beautifully. A thick drop of my cum slowly oozed out. She collapsed onto her side, breathing heavily, and whispered, “That was the best fuck I’ve ever had.”

We both just lay there afterward, quiet and zoned out, wondering what this new relationship between us had become.