"Brother, you can do anything you want with this hole (anal)..." This is the story of a strange brother and sister. The sister remained a virgin until she got married. The brother had always been a virgin. But the brother and sister had been having anal sex for a long time. There was an unspoken rule that they couldn't insert into each other's vagina. This is the story of a brother and sister who continued to have anal sex for 10 years.