Introducing The First Grandma. Marian Robinson, the mother-in-law of President-Elect Barack Obama is moving into the White House- at least temporarily- to support her daughter Michelle and granddaughters Sasha and Malia as they adjust to their new life in Washington, transition officials said Friday. Mrs. Robinson, a Chicago native who retired from her job as a bank executive secretary last summer, has never lived outside of The Windy City, so the move will be as big an adjustment for her as it will be for the other four members of The First Family. Barack...