DEAR MISS MANNERS: I am writing to you on behalf of a fracture in my family — namely, the infamous #fishgate. One Christmas, my father purchased a large salmon. My husband then smoked the fish, which we all ate. After the meal, there was some leftover fish. My mother first asked my husband if he would like the leftovers, and he said, “No, thank you.” My mother then told my brother he could have it. But unbeknownst to us, my dad had already packed up the fish to take home for my mother, who is pescatarian. My brother got very annoyed and demanded the fish. My father rather sheepishly gave it t…