My sister showed me what her and her boyfriend you'd to do

One day me and my sister was walking home from school . She told me she had to show me some . I followed her and she lead my behind a 7 11 store back behind the trash bins . There was a old desk setting back there that had been thrown out year's ago but never got in the trash . She removed her pants and underwear and sat down on the desk . She she thin said come on brow before someone spots us. I walked over to her and ask what she was doing . She unzipped my pants pulling out my rock hard d*** . She smiled and said see it's ready for its wet baby sister . I wasn't sure what to do so I shoved it in . She was really wet so it went right in . At first it was a bit wearied to look at her while having s**. Soon she had her legs around me and I was holding her up Wich made it go deeper . It felt so good I was over her being my sister and I was lost in her sexy blue eyes . Soon I felt my c** pumping deep inside of her . After we had a second to breath my sister said brother u wasn't supposed to buy it . Thin she kissed me and said brother l love you but baby sis was not on the pill . As we was leaving she wispered in my ear some has a new girlfriend and kissed me .