Dear Amy: Neither my wife nor I came from money. But thanks to a lot of hard work, good choices — and luck — our children will come into money. Both of our kids are grown, married to terrific partners, and on good career paths. My wife and I are in our late 60s and in good health and we’re thinking about giving them a full picture of the extent of the potential estate when we’re all together at the holidays. Is there any reason not to do that?