The sisters exchanged the techniques of getting fucked

my sister and I were watching the porn video in the room and exchanging ideas on how to fuck. We like to share this kind of things to learn more and become more whores. At this point enters the scene, our brother, who has had months without a fuck, and I came up with an idea. Use it to prove to my sister as I like to fuck. Because he was so excited for a long time without eating a vagina, he agreed without apology. That afternoon I made examples of how to fuck on all fours and how to make a good blowjob. My sister I was really surprise, she even has a good techniques to increase the intensity of your orgasms. Also, some lesbian tendencies that I thought were very sexy. It was an afternoon of learning for us, and relief for our poor brother.