OK, my school doesn't ask that question but it has asked questions in the past that have lead people to write some things about their parents' behavior that made me really uncomfortable (just imagine a week worth of Jerry Springer topics).
Do you know right from wrong? Other than cheating on exams have you ever faced a time when you had to make a decision based on right and wrong?
If all the questions about drinking and drugs on campus is any indication, many of you have faced decisions about parties, fake IDs, and friends who have been impaired.
If you were raised in a religious household, did you reach a point where you questioned a moral teaching of your faith tradition? If you were raised in a tradition-bound household, did you reach a point where you were faced with a choice between conforming to parental expectations or going your own way (particularly decisions about dating, marriage, living away from the family, dressing in a particular manner)?
Whatever you do, don't tell me about your father's love child or any other "familiy secrets". What the commitee really wants to know is how you make a decision and what values you apply in making decisions.