Complex sentence: Elaine went on to marry Morris Walters, and together they had a Daughter named Jennifer becoming Susan's niece; while Susan herself married a man by the name of Drake, making her Susan Banner-Drake.
Split into simpler sentences: Elaine went on to marry Morris Walters, and together they had a daughter named Jennifer, Susan's niece. Susan married a man by the name of Drake, making her Susan Banner-Drake.