My gf lived with her sister and I would go over from time to time, but that meant we would have to sneak around when we wanted to fuck since we never really had the place to ourselves and her sister could come in on us at any moment. The place was pretty small. A living room and kitchen, a bathroom and a single bedroom. That meant they had to share a room. As bad as it sounds, that would lead to my encounter with her sister. It was late one night and I headed over to get me some pussy. I ended up texting her but got no response. I figured maybe she had fell asleep. Now usually her sister would still be out, since she worked late but I was in for a sweet surprise. We sort of figured out our schedule of when we could fuck and I just assumed it would be okay to drop by, so I did. I got to their apt and opened the door, I was given a spare in case of emergencies, and I slid inside. The place was silent. I made my way to their room and opened the door. Looking into the dark room, the only light coming into the room was from outside. I could see a figure laying on her bed. Perfect. I thought. I went ahead and took off all my clothes as I stood there stroking my cock. I was so ready to fuck her pussy. I went ahead and slid into the bed, under the sheets spooning her as I slid my hands over her soft thighs and then between her legs. My fingers found her clit and I started rubbing it. Kissing her gently on the cheek and then on the neck, as I pushed her hair aside and I started to lick her neck up and down. She started moving as she opened her legs and I was able to rub her clit going from side to side. She looked back at me and we started kissing as we laid there. Both of us moving all over eachother. I felt her hand reach over as it found my cock and she grabbed it, feeling how hard I was as she started stroking me. Both of us moaning as we felt eachother with our hands in the dark. I could feel her pussy getting wet as my fingers started sliding into her pussy. I was able to slide a finger inside her as she gasped and moaned. Then two and three fingers. I finger fucked her for a good minute as her hand let go of my cock and she went ahead and pulled her shorts down and threw them onto the floor. She found my cock again and I knew what she wanted next. She opened her legs and stuck her ass out towards me, tugging on my cock she tried to get me inside of her. I let her guide me as I thrusted my hips forward following her lead and my cock soon slid inside her tight wet pussy. I grabbed onto her, spooning her closely as she let go of my cock and I was balls deep in her pussy right from the get go. She was so wet, so fucking tight, so good! Letting out a deep moan, I started to fuck her pussy. One slow thrust after the other, and then back and forth I pounded her pussy. My balls slapping against her ass. It got so hot she had to pull off the sheets. Eventually having to take off whatever top she had on and my hands grabbed onto her tits. Her pussy felt extra good tonight and I fucked her while sucking on her tits, my face pushed onto her tits as I licked and sucked them. Coming up I kissed her telling her how much I wanted her. She let out a louder moan and that’s when I knew something was off. I fucked her for another minute, fucking that good pussy before I pulled out. “Let me turn on the lights.” I said as I got up and went over to flip the switch. On the bed laying there naked, wasn’t my gf. Instead I saw my gf’s sister. Her hand covering her pussy as she continued to pleasure herself and she looked at me. She had slept on my gf’s bed, don’t know why, but for some reason it wasn’t even awkward when we realized just what we were doing. We were both just too horny at that time. My cock was still rock hard as I took it in my hand and stroked, watching her play with her sweet shaved pussy. After a minute of playing by ourselves we decided we had to continue. We had to keep fucking. I stepped over to the bed and she got up and crawled over, getting on all 4s she leaned into my cock and took it into her mouth as she started sucking me. Her lips wrapped around my cock and her tongue sliding back and forth. It felt so good. I reached over her and grabbed her ass, spreading her ass cheeks apart with both hands slapping her ass cheeks. Making her moan as I started to finger her pussy again. She stopped sucking my cock as I started finger her. Moaning as I finger fucked her. With her mouth open I thrusted and slid my cock back into her mouth. I fucked her mouth slowly as she slobbered all over my cock. I gave her ass a hard slap as I stood up straight and I pulled her up, getting her to her knees on the bed as I gave her a kiss. We made out for a moment, just settling into it as I then got her to turn around. Falling on all fours she waited, ass up and giving me an amazing view of her round ass. My hands placed on her ass as I felt it all over. Looking right into her smooth asshole and her clean shaved wet pussy. I leaned into it shoving my face into her pussy, eating and licking her up and down, even making my way up to her tight little asshole, sucking on it and licking it all. Showing her just how bad and horny I was. Tasting her sweet pussy juice and swallowing everything that came into my mouth. Her hot moans made me want to keep going, keep eating that sweet pussy but i knew I had to fuck her again. After eating her out, I got up and grabbed my cock , I need to feel that pussy around my cock again. I pushed into her from behind as my cock penetrated her pussy again. My hands placed on her asscheeks as I looked down watching myself fuck her. Although my gfs ass was better, her sister also had a very nice ass. It was definitely wider. A little bit fatter. I gave that ass a slap, keeping my hand on her ass and pressing down I pounded her. Fucking her hard, shaking the bed as I thrusted into her from behind. That pussy so wet as I felt it slide back and forth on my cock. Seeing cum from her pussy cover my cock everytime I pulled back, only to thrust back into her. She was such a bad slut she started fucking herself on my cock and all I could do was watch. Her moaning was getting louder and louder. I reached under her and grabbed a hold of her pussy, my hand on her clit. She fucked herself harder as she grabbed my hand on her pussy. “No!!!” she begged. She had to stop, but the moment she stopped, I took over and continued fucking her. I knew she was ready to cum and I wasn’t going to stop until I had her cumming all over my hard wet cock. “Im cumming, omg im cumming!” she screamed. Pounding that pussy hard and rubbing her clit, I made that slut cum hard. Her body went limp as she fell into the bed, her ass still arched up for me. Her pussy tightening its grip on my cock as she laid there. I grabbed her hips and had my way with her pussy as I continued to fuck her. I wasn’t done yet as it was my turn to cum. Fucking her as fast as I could I was thinking if I should cum in that pussy or not. It felt so good that I was tempted to cum inside her. I really wanted to. After fucking her hard for a moment, I ended up pulling out. Standing there, cock in hand and looking at her “Suck my cock and make me cum….” I told her. She was exhausted but she got up and got on her knees on the floor. she grabbed my cock and licked it up and down, grabbing my cock with both hands stroking it with her mouth wide open and tongue out. I looked down at her, seeing how good she looked holding onto my hard cock. The sight of that was enough to make me cum and I instantly shot out cum all over her face. Across her eyes, her lips and into her mouth, onto her tongue. She closed her eyes licking her lips, her tongue running all over her lips. She opened up her eyes seconds later and she saw me looking down on her. Cum still oozing from the tip of my cock. her hands covered in cum as it drizzled down from the tip. she gave my cock a kiss and slid it back in her mouth sucking me slowly. Licking the last bit of cum that she managed to squeeze out from the tip of my cock. Once done she finally let go and she backed off. There was nothing to say and I had to leave, so I wiped my self in the bathroom and grabbed my things to leave. As I got out , she went in and cleaned herself after me. I walked down the sidewalk outside their place and not long after heard my name being called. I turned around and saw my gf, just minutes after leaving the house. She came over , gave me a kiss and asked me why I was in the area. I told her I thought id stop by but she wasn’t home so now I had to go. She said her phone had died and she forgot her charger which is why she had no idea I had planned on coming over tonight. I told her it was okay as I said my good bye and I said id be back tomorrow. I was about to leave but she gave me another kiss and I felt her hand squeeze my cock and balls. “Get that cock ready, you’re fucking me tomorrow.” She said sucking on my lips. I said okay turning to leave as she watched me walk off before going inside. Maybe i’ll come over tomorrow and the lights will be off again.. who knows.