I'll never forget the day (nearly five years ago now) when The Oldest said, in a tone so like her mother's snide dismissiveness, "If you didn't want to be a stepmom, then you shouldn't have decided to marry a man with kids." It hurt. I felt blind-sided. I had no good answer. Instead, I sat for a second speechless and nonplussed, and then the conversation moved on. I didn't want to be a stepmom. I don't know if anybody ever wants to be a stepmom. So why did I become one?