Beyond the family and school, however, ethics is often situation-specific in professional life.
This is perhaps why there are so many business scandals, because if everyone appears to loosely regard ethical rules, it is tempting not to uphold rigorous standards such as not cheating the company's time, doing the best work one can do at all times, etc.
The fact that exceptions from ordinary situations may justify isolated violations of otherwise sound ethical rules does not undermine the value of those rules; in fact, in certain instances, adhering to formal rules may cause harm instead of preventing harm, which is the purpose of establishing formal rules like traffic laws in the first place.
Practically all ethical perspectives, as well as ordinary common sense, view purposeful deception for personal gain as unjustified immoral conduct.
In terms of my own development of ethics, probably the first ethical education any child receives comes when he or she is first tempted to swipe a piece of candy from a store.
Unlike the moral commandment to 'be nice to your sister,' or else she will cry, or the value of friendship not to 'snitch' in class when your best friend doesn't have his homework, eventually one learns that one has an ethical obligation not to steal.
I can believe in God, or believe in Darwinism, but that does not mean I believe God is good or evolution is good, merely that I believe they exist, based on my intellectual orientation.
I may value the pursuit of education and having a family as one of my core values, or value upholding the virtues of being a good child and a good friend, but values are rather vague in terms of priority, for they do not instruct that one must do one or the other action -- ethically I am bound as someone with insider information about a stock not to reveal that information, even if I value someone's friend friendship, because I value my commitment to my professional code more than simple friendship.
Ultimately, the books teaches that though Anna had the "right" or appropriate set of ethics and morals, she was meant to die so that Kate could live because Kate is the child her parents actually wanted.
Out of all the characters in the story, the character of Kate might be the most challenging.