I catching you wanking off into my knickers, I am angry at first but then I find it funny. I make you give them me back and show me your willy, omg its tiny!! my brother has a tiny willy it is so funny! Unless you do as i say, i will tell everyone at school about your tiny willy and how much you love your sisters knickers! I make you repeat some humiliating phrases then I tell you I am going to put my ass in your face and you are not allowed to cum. I peel my knickers down and put my big bottom in your face, spreading it, spanking and shaking it. If you cum, i will tell everyone at school your little secret and i am going to do everything possible to make you cum! Of course, you can't resist cumming looking at your sisters big bottom, but it is the most pathetic cum shot i have ever seen!