Prior to that, they spent an hour late in the afternoon touring a center for Islamic art and culture in Honolulu. The center is in Shangri La — the former mansion of the heiress Doris Duke that overlooks the Pacific Ocean near Diamond Head. The president’s brother-in-law, Konrad Ng, is the director of Shangri La. Ng is married to Obama’s sister, Maya Soetoro-Ng, and the couple and their family live in Honolulu.