Family is among the most significant things in the world. But what would happen if someone in our family chose, for no apparent reason, to wreck our lives? They could counter that their actions serve a higher purpose and want to ensure we never lose sight of our roots or grow too conceited. However, where do the lines cross? that boundary between outright cruelty and helpful criticism and honesty. The story below has left me completely in shock. OP is a frustrated sister who has had enough of h…