At Christmas, I Gave My Sister An Envelope With Three Months’ Rent Covered. But She Made It a Joke And Said: “So this makes me part of the family again?” ————— At Christmas in Buffalo, the snow came down in sheets—nothing unusual here. I parked by the curb outside my parents’ colonial, carrying a pie, a Target bag of gift cards, and one white envelope. Three months’ rent for my younger sister, Leah. A clean start. I handed it to her across the dining table—candles lit, a tiny flag in the centerp