On the day their parents were away, he and his sister had sex all day, draining her of her stamina. (Natsuhara Yui, T28-549)

After her parents left, Xia Yuanwei was left alone with her brother. Her heart raced, and she began to crave her brother, watching them engage in incestuous acts! With an innocent smile, she writhed her amazing body, letting her brother's penis thrust into her until he ejaculated inside her!