User blog comment:Melspuppies8282/Captain Laura Smith/@comment-74.193.166.113-20120606231420/@comment-996391-20130422120928

Will's mom died before the events of The Curse of the Black Pearl and according to The Secret Files of the East India Trading Company, Arabella was still alive during the events of At World's End. Therefore, the relationship of Billy & Arabella ended at some point after the events of the Jack Sparrow series and before the events of the Legends of the Brethren Court series.