Playing with My Little Sis (Fictionalized Story)

My parents were getting the house remodeled, and right then they were working on my sister's bedroom. That meant that she was sleeping with me for the first time since we were little kids. She was livid to share a room with her big brother at our age, nonetheless, and I too I was not looking forward to the impending invasion of my privacy. Soon, however, I would change my mind about the new sleeping arrangements. First, I should probably mention that my family were nudists. I never had clothes on around the house, and my sister, who I will refer to as Maddie, usually just wore underwear without a top. Because of this, we were completely comfortable with our bodies, and didn't spend too much time thinking about the other's anatomy. That all changed one night once we had come to terms with the new sleeping arrangements. It was late, and we were whispering to each other about something instead of sleeping. As our conversation went on, I gradually noticed that Maddie would occasionally glance down when she was talking. It was just for a split second, but it was definitely happening. "What do you keep looking at?" I asked her. She blushed, as if I had caught her doing something she shouldn't be. She seemed to debate for a second whether or not to tell me the truth. Her honesty must have won out, because she whispered that she had been looking at my dick. For some reason, my heart fluttered when she said this. We saw each other's everything all the time, so why was she so interested all of a sudden? The only way to find out was to ask, so I did. "It's just that, it looks so small right now, but I could've sworn I've seen it bigger," she replied. "Yeah, it does get bigger sometimes, obviously. I know a sure way to make it happen. Wanna see?" She simply nodded at me. So, I started playing with it. I took my cock in my fist, and started to pump. As promised, it began to grow in size. My sister had to stifle a gasp. "It's so much bigger than I thought it would be!" Maddie said. "Can I try it?" "Sure! Just wait for me to lose my hardon so you can start from scratch." We lay in silence while waiting. I knew it would shrink faster if I thought of something else, but Maddie never took her eyes off it as it returned to normal size. "I'm ready," I told my sister after a while. She started exactly like I had showed her, by grasping my cock with her much softer and smaller hand. Wow! It felt so different when she was doing it. It was like she had sent an electric shock through my body. Maddie giggled. "Fuck this is making me horny," she said. Apparently, I wasn't the only one who was feeling new sibling feelings. As my cock got bigger and harder and Maddie decided to spit into hand for lube. As she adjusted herself into a sitting position, her hand quickly bobbed up and down along my shaft. Another shock went through my body, and I moaned lightly. "God that feels great." My whole body was on fire, and I could tell Maddie was enjoying herself too. I was disappointed when she stopped again. "Sorry bro, but I've got to get some pussy attention right this minute," she told me as she removed her underwear. "Do you think you could make me cum too?" "I'll sure try," I said. At that point, I would've done anything she said. I sat up to face her, and as she resumed stroking me, I began playing with her. I had obviously never done anything like this before with her, but a pussy is a pussy and I got to work. I noticed how wet she was getting. I teased her by rubbing up and down her slit outside her panties. On my end, the pleasure was so intense by this point that I'm surprised I was able to function at all. I felt Maddie getting wetter and decided it was time to give her clit some love. "Yes! Right there! That feels so good!" she exclaimed. Now that she was being taken care of as well, Maddie's breath was on pace with mine, and her hand was moving much faster. My heart was racing, and my whole body was light. I felt a pressure building up. This orgasm was going to be epic. When I heard Maddie moan, it was too much and I came at that very moment. I stopped rubbing her as my whole body stiffened up. Then, my cock started throbbing, out of my control. Waves of pleasure crashed down on my whole body, and cum shot out of my cock. "That was a ton of cum!" she said. "I'm not sure I've ever shot that much, Maddie! You just gave me the best handjob of my life. Your turn," I said as I resumed circling her clit. As hard as she might try to be quiet, a cute little moan escaped her lips every few seconds. I was glad that I could make her feel so good! Soon, she was breathing even faster and was bucking her hips fucking my hand as I fingered her hole. Then, her whole body tensed up, and her face contorted into an expression of pure pleasure. I sand watched in ecstasy as her whole body spasmed. It looked like it was taking all her willpower not to scream out. Then it was over, and we both lay in silence, panting. "Wow," she said eventually. "Wow," I agreed. "We should sleep now, but can we do that again tomorrow?" my sister asked me. Of course we did, and just about every night after that too. We only stopped when she moved back into her room. Oddly, we never talked about it again, but I still get off to thoughts of those nights, and I'm sure she does too. Sometimes, when it's really quiet out, I can still hear her moaning through the wall. God I love my sister.