I don't disagree with this, but the children have the right to know - for example, are there inheritable medical conditions which they may be at risk for? or if not medical, what about inheriting other traits? I think this paragraph summed up this concern well: "Ballard struggled with what it meant, existentially, to have inherited the DNA of a man who would lie to his patients and abuse his position as a doctor. Whatever made him do it, was that inside her, too? She knew the thought wasn’t entirely rational, but she couldn’t shake the feeling that a dark impulse might be lurking deep within her."