I agree with Amy, and I think the commenter is egregiously wrong. Everyone has a right to know about their genetic background, for medical reasons if nothing else, but in this case, her family history, which sounds awful, is another strong argument for it. In the mother's lifetime an argument could be made that it was "her secret" perhaps, although for the above reason I think keeping it from her was wrong. But contrary to their claims, now that she's dead, her opinion carries no weight! Nothing can hurt her or her feelings now, and the real and practical concerns of her living daughter take precedence. And her daughter is in pain and has suffered her whole life in a way that this secret is extremely relevant to!