“A consequentialist account certainly gives reasons for why the doctor should not breach confidentiality on the grounds of the possible deleterious effect on the family. This is the main reason why most geneticists would not tell John that he is not the biological father of Sarah’s child. But it is not entirely clear that the consequences of keeping John ignorant are better than informing him of the truth. Is it right that Sarah needs to be protected from the consequences of her act and will it be better for the family if this remains a secret?”