Complex sentence: During the five years that they lived there, she delivered a son, Sam, Jr. The couple relocated to Fort Myers, Florida, where Sam's brother Buck had amassed considerable wealth managing a Bolita gambling business.
Split into simpler sentences: During the five years that they lived there she delivered a son, Sam, Jr. before the couple relocated to Fort Myers, Florida. It was there that Sam's brother Buck had amassed considerable wealth managing a Bolita gambling business.