His sexual drive was far ahead of any human and had actually grown quickly into a full-blown addiction. Even when he tried to control it he could only...last so long before it plagued his mind. Eventually focusing on anything else, school included became a lost cause. In reality though he could make any woman lust after him, but he could not control his own. It would take a rare woman to love such a man: a woman that David doubted would ever come.He tried many times to make his relationships with. I was even more shocked at how it changed my life, revealing something in me I never understood, never knew existed.I was at a club with a couple of friends, and it was late, past midnight. I had accepted some dances with a couple of guys, and my two girlfriends were off flirting and having a grand time, and we would meet every so often and compare notes.Having to pee badly, I excused myself from a nice, good looking guy who was talking to me, and went to the ladies' room. For once, it wasn't. Whimpering, she asked. "Even though we are not real brother and sister. Do you still love me?"And I said, "We are brother and sister. We had the same mother just not the same father. I will always love you just like dad loves me even if I am not his real son."She hugged me real hard and said. "Thanks, big brother I will always love you too."It all came to a boiling point with my sister the night of our Graduation. (I guess I forgot to mention that Mary Anne had jumped a grade between the ninth. And as I inserted my finger, she started to moan and breathe heavily.Slowly, I inserted another finger and felt the tightness of my elder maid’s pussy. She was moaning and enjoying a lot. I started to massage her love spot and her moans were getting louder and louder.Her moans were echoing in the whole room as she reached a point of orgasm. I stopped fingering her pussy, just in time. She opened her eyes and looked angrily at me and started scolding me, “You son of a bitch, why did you stop?!.