Complex sentence: Porter has three children and ten grandchildren from his first wife, Ada Guthrie (aka Aiola)--he and his second wife, Joan (who has one child from a previous marriage), have homes in Portola Valley, California and Princeville, Hawaii.
Split into simpler sentences: Porter has three children and ten grandchildren from his first wife, Ada Guthrie (aka Aiola). He and his second wife, Joan (who has one child from a previous marriage), have homes in Portola Valley, California and Princeville, Hawaii.