A look at nine months in the lives of two half-sibling couples, one in Scotland and one in America, whose incestuous relationships began after reuniting as adults and which they believe to be the result of Genetic Sexual Attraction, which occurs between relatives who are reunited as adults after several years apart. Destroying marriages, facing prosecution and disowned by families and friends, both couples feel a sense of helplessness about the strength of their forbidden love and anger at the society that refuses to accept their love between consenting adults.
—thomaswake16