Queen Elizabeth II’s struggle to balance her sometimes-conflicting roles as monarch and grandmother, says Levin, author of “Harry, a Biography of a Prince.” Yet she says there's little doubt that ultimately the 94-year-old monarch will make her decision based on what’s best for the 1,000-year-old institution she has led since 1952.“The queen has a motto: Never complain, never explain,’’ Levin told The Associated Press. “And she’s stuck with this for four decades.