Let me start with I am 24 and have been very sexual since I was 15. I had always had a thing with older men and started my sexual experiances with seducing my teacher and a couple of my best friends dad's. I know a bad girl looking for trouble. Somehow I was able to finish school and graduate from college and have a good marketing job. I am living in a 3 bedroom apartment with my younger brother age 22 and a female friend Brenda 23. Brenda and I are both bi. We have played together maybe 2 times a month. One time I came home I found Brenda in bed with my brother. I felt jealous seeing her with him. Needless to say they were both embaressed. Later that night she came to my bed to say she was sorry and made up for it very well. The next weekend we were all watching movie on the couch and had been drinking. I could tell my brother and Brenda were playing under the covers. I slid my hand under the covers and found my brother's hand down her panties. Before he could pull his hand out I held his hand in place. My fingers joined his inside Brenda's love box. We started to kiss her and fondle her and we undressed her. We took turns on playing with her breast and love box. Some where along the line we were all naked. I had not seen my brother naked since we were little kids. I was amazed on how handsome and sexy he looked. I watched as he entered her deeply. As they were in doggy I got under her to give her oral. While giving her oral I started to play with my brothers boys. The more I thought how wrong this was the more I wanted him. After Brenda had her O and he pulled out I started to give him a bj. As I gave him a bj he was making out with Brenda. I couldn't hold myself back and I mounted him. The night turned into a blur as we drank and had sex for the next 3 hours. I woke up first the next morning and snuck back to my bedroom in denial that it ever happened. Nobody said anything for the next couple days until Brenda came to my bedroom. After we played she suggested we get my brother again. I said NO, that should have never happened. She got up and left. I heard her go into his room. I peaked in and they were having sex. I was horny again just watching them. I wound up joining them. Next morning Brenda was up first and left for work before we woke up. We woke up and it was so strange. He just smiled at me and said well sis, shall we get some breakfast? I said, sure. I took a long look at me and said, you know all my buddies had a crush on you. You are so hot. As he said this he ran his hand across my breast. My nipples jumped to attention. We attacked each other in a sex hunger that could not be satisfied. I have had sex with a lot of men, but my brother is by far the best. For the last 4 month we have now been doing 1 on 1s 3 somes and just Brenda and I. I know at some time this must end. But for now, we are living in our own little world.