After dance class one evening, my daughter announced that she was getting a new mom—and her new mom was her dance coach.

One evening after dance class, my five-year-old daughter casually announced that she was going to have a new mom—her dance coach. I tried to keep my cool, but her words didn’t seem like a joke. The more she explained, the more it became clear that something was happening behind my back—something I never imagined. I…