Barbara Bush has a sister who is an editor-at-large for what magazine?
Barbara Bush (born 1981): Barbara Pierce Bush Jr. (born November 25, 1981) is the elder of the fraternal twin daughters (the other is Jenna Bush Hager) of the 43rd U.S. President George W. Bush and former First Lady Laura Bush. Jenna Bush Hager:  Hager is an author, an editor-at-large for "Southern Living" magazine, and correspondent for NBC News.
Southern Living