I do notice she was wearing right shorts and a short top kinda like a tank top. She kept moving around in her chair like she couldn't get comfortable....I asked if she was ok and she said yes but her voice kinda shattered. She asked to use the restroom. If course I let her. I realized the chair she was in had a wet spot. Figured it was where she had her beer between her legs. She asked if she could get me anything. I asked her to make me a run and coke. When she brought it out to me she was. Just up and down with hand on penis. You may not know but you may successfully make semen.Me: Okay, Maria ( I always switched between Maria and chechi to call her)Then she dried my penis and asked me to go. This incident made us become very open to each other.That very day I jerked off thinking about her. I went to her and announced that semen came. She was so happy for me and hugged meMe: Thank you chechi for teaching me this awesome techniqueShe: You are my little bro, it’s my duties to teach. ’ But instead I just went in my roomand shut the door. I had so many conflicting emotions Ididn’t know what to do. I loved my sister more thananything, but now that love was mixed with lust forthis slutty woman. When I opened my door I knew therewas no going back. I went next door to Sammy’s room and knocked as Iopened the door. If my mind wasn’t made up when Ibarged in her room it would have been by what waswaiting for me. Once more my sister was nude in frontof me, but. “Crystaaall.” he said. I stopped and turned towards Jim which stopped him in his tracks. “As I said Jim, this isn't about you. It's about Crystal. If you love someone, you want them to be happy. I'm going to make Crystal happy; and you get to watch. So you can shut up and come watch, or you can drive home alone and I'll bring her home later.” Then I turned and took Crystal's hand and we continued to my car.At my car I opened the passenger door for Crystal and then went around to the drivers'.