I took my boxers completely off, and sat on my knees between her legs. I leaned down towards her, holding my cock. I let the head of my cock stroke up and down her slit a couple of times, teasing her pussy. She moaned. Then I slowly started to push myself inside her. God, it felt so good. I took it slow, I wanted to last as long as possible. Not only because it felt so nice, but also I wanted to give her an orgasm. I started fucking her, long slow strokes in and out. Pausing at the bottom and just before I slipped out of her before pushing back in. I leaned further down towards her, using one hand on the floor to steady myself. The other hand playing with her tits, occasionally i would lean down to kiss her nipples or her mouth. I was able to last a lot longer this time. I kept fucking her, slowly building up speed. Soon we were both moaning loudly in pleasure. This time I didn’t notice her orgasm approaching. She arced her back and let out a loud moan. I had yet to cum, so i kept fucking her trough her orgasm. She looked me in the eyes and told me to fuck her harder and faster. “Come on little brother, fuck your big sister”. I could feel the sweat pouring out. I was going as fast as i dared without letting my cock slip completely out of her. I let out a loud moan, almost screamed. As I thrust into her one final time, our bodies coming together with a loud smack. And I released a stream of cum inside her. Panting heavily i collapsed on top of her, my head was swimming. “wow, you’re getting the hang of it” she said, “good thing I’m on the pill” she laughed. “Yeah” I responded, realizing I hadn’t given any thought that she might have gotten pregnant if she hadn’t been on the pill.
After catching my breath for a while, I went back inside. I needed to cool off for a bit, I had a drink of water before taking a quick cool shower. The rest of the day proceeded like any normal lazy Sunday. I joined Lisa on the balcony sunbathing for a little while, just enjoying the sun this time. And then I went to my room and played on my computer. Normally I would have used the opportunity of a quiet house to surf for porn online, but I didn’t feel the need for that now.
In the evening we made dinner together like we usually did when we were home alone. After dinner we sat down and watched TV together, again like we normally did. It seemed like our new found passion for incest didn’t have much affect on the rest of our life.
It was getting past 9pm when Lisa said “Our parents are coming home tomorrow, who knows when we will get the chance to be naughty again”, “You’re right” I said, “want to fuck again?” “I do” she answered. Then I asked “would you mind if we fuck in your bed this time?” “Sure, why not” she replied, got up from the couch and headed for her room.
This time was a bit less sensual. We basically just threw off our clothes and tossed them on the floor. “Do you think you’re up for something a bit more advanced” she said with a smile”. “I think so” I said, “what do you have in mind?”. “Have you heard of the 69” she asked. I said I had, I had seen it in porn films. And i thought it looked like fun. She confessed she had never done it before either, at least not with a boy. But she would really like to try. I laid down on the bed, and she got on top of me. Her wet glistening pussy right over my face. I grabbed her hips and raised my head up between her legs and started licking her. Lisa was taking my cock in her mouth again. It was really good, but a little awkward on account of us both being new to the position. But we eventually got into a sort of rhythm to it. I was licking, sucking and lapping at her pussy. While Lisa was doing the same on my cock. After a while she sat up, and lifted her pussy off my face. She turned around and lowered her pussy onto my cock. She laid down on top of me, our hips moving in rhythm as we continued to fuck. I put my arms around her and we kissed while we were fucking. It continued for a good while. By far our longest fuck yet. But eventually, after a long, blissful, happy time. The familiar heavy breathing was building. And then it happened. As our hips met, we both came. Almost simultaneously, moaning and panting together. It is a truly wonderful experience to be able to share an orgasm. At the end of a long day of sexual adventures (especially for me, two days ago I had been a virgin), we were both sexually exhausted and satisfied.