我害羞的继妹发现我在用她的内衣自慰，我狠狠地操她，直到我射在她的屁股上。

My stepsister discovers me when she enters her room and watches me masturbating with her underwear. When she realizes she complains to me why I do that, I seduce her and say that I like the smell of her underwear too much and I end up fucking her hard until she makes me run.