My Superhot i****t Experience

so... I have a sister 3 years older than me, I think she is a hot girl, when she was younger she was even hotter... when we were at high school, we spent a lot of time together, we were really close. For me and my sister, at that time, sex was a taboo, but we were really curious about it. One summer, I went on holiday in France, Nice, with all my family (very nice place :-)); that holiday was really funny, me and my sister had a separate hotel room to sleep. So, one day during that holiday, we went back from a tour and we were a little bit tired; of course, we were excited after the nice day, and we started playing in the room... at a certain point of the discussion (I do not remember it all), my sister told me "so, if I don't do this, what would you do to me???"... as we were playing, I answered very naturally "I would **** you:-D". Now, instead of being mad about this answer, my s*s laughed a little bit at me and... she was lying on the bed under the sheets, she put her hands under the sheets and, my god, she pulled off her panties, throwing then away, telling me "OK show it to me". It was embarassing, but... my cock became hard as a rock and it was pretty evident :-D so I laughed as well and I went to the toilet. There, I removed my panties as well, my cock was really exploding and I did not know what to do next... my body was telling me to go out and fuck her, but, what if it was all a joke? ... however, I decided to act, I told her from the toilet "OK turn off the lights and I will arrive". I went out, the light was out: I went to bed near my s*s, and... my god, she put her finger around my cock (still thinking about this makes me so hot) and carefully she guided it inside her pussy... so very gently, I started fucking her pussy, she was so wet, my god... my cock started to go in and out her excited body, it started to feel really good. But that is not all: while I was fucking her, she put her hands around my ass, it felt so nice but... her finger started to explore the region near my asshole: wow, it was sooo good, she did not penetrate me, but she liked to play a lot with my hole, it was incredible. My cock was ready to explode inside her, so she told me to stop; I had to stop, so I went back to the toilet and finished what I started (I did not want to make her pregnant of course), it was the hottest thing I ever did!