At Christmas, I gave my son a brand-new car and his wife a designer purse, thinking love still mattered. Then he smiled and said his wife wanted to “teach me a lesson,” so they had no gift for me.

At Christmas, I gave my son a brand-new car and his wife a designer purse, still believing love meant something. Then he smiled and said his wife wanted to “teach me a lesson,” so they had no present for me.   I did not cry—I simply reached into my bag, took out one envelope, and…