It Happened Last Saturday .

My parents are away for 6 weeks and my best friend also 18 is staying with me . One Saturday i went clothes shopping . He did not want to go . When i returned home i went straight to my bedroom to hang up my new clothes . I had to pass the bedroom that he was using . As the house door was locked i thought he had gone out . The bedroom door was slightly open . I could hear someone in there . I sneaked a look through the gap in the door . He was on the bed fucking a girl . He was grunting as he was cumming . It was only when he rolled off her that i saw who it was . It was his 12 year old sister . I did not know what to do . So i went out locking the door behind me . There is a local cafe . I went there for a coffee . Sitting in there for 45 minutes . Then i went home . He was in the lounge with his sister . I said hello to her and acted as if i had only just arrived . Later when she went home . I wanted to tell him i had seen them . But i did not know how to do it . In the end i just came out with it . We talked and he told me that when he was living at home . If they were on their own they had sex . It had started when she was 11 . I asked him what it was like to fuck a young girl and was it more exciting fucking his sister . He told me if i wanted to have sex with her . He would ask her for me . He arranged for her to come round the following weekend . If i did not want him to be there he would arrange to meet up with friends . I told him that would be great . When she came there was no messing . She undressed for me . I took her up to my room . She had small developing tits and a bald vagina . After i undressed we lay on the bed . I touched her vagina . She asked if i wanted to lick her . This made her cum . She asked me to fuck her . When i had cum . We talked . She told me that she had a fantasy about being fucked by 2 boys . With one after the other cumming in her pussy . She asked me if i would help her to do it . Letting her brother fuck her first and then me fucking her . Me and her brother sometimes wanked each other and gave blow jobs . It had first started when we were 12 . If he agreed to do it so would i . She asked if he would do it . He would but he had to be first to fuck her . The next weekend i put a towel on my bed to protect it . Her brother fucked her . As soon as he pulled out i was fucking her . It was strange feeling her wet with his cum . At the same time it was exciting . When i had cum i watched our cum leaking out of her vagina on to the towel . That was only my first time of getting sloppy seconds with her .