Incest will never be acceptable and nor should it be. It is a choice. The same as beastiality. Homosexuality and peodophilia are not always a choice. For a parent to take advantage of a child no matter what age is abhorent. I read something not long agao about a brother and sister who were seperated at a very early age and fell in love later in life not knowing at the time that they were actually brother and sister. How devastating would it have been to find out that the person you were sleeping with and intending to marry was sister/brother?