True or not ??? I have honestly played doctor with my sister, had a year long affair with my niece, and f***** two of my sister in laws. All I can say now is that with the real experiances of incest behind me,Is that anyone that has been in an incestuous encounter can tell which storys are true or not. And to those that think it is so discussting, don't know how common it really is, or how fantastic it can be. so all I can say is : Incest is best, Put your uncle to the test.