My sister said I wasn’t “rich enough” to attend her wedding, and when my mother added, “Then don’t come,” I quietly walked away—but that evening, entertainment channels were replaying the moment her groom publicly humiliated her in front of 300 guests, turning the wedding they excluded me from into the story everyone was talking about.

My father, Gerald Marlo, had built a respectable commercial insurance agency from almost nothing. It never became the empire he liked to imply it was, but it gave us a…