Previous attempts to explain the case of πορνεία in 1 Cor 5 have inadequately addressed the social and legal consequences of the relationship and the motivation of the individuals. When these are considered from the perspective of Roman law and customs it is more likely that the woman was the concubina of the man's father, not his stepmother. As such, the relationship was unusual but it was not considered illegal or immoral by the Corinthians. Paul, however, would not have understood the difference and thus saw it as.πορνεία