Complex sentence: Lily van der Woodsen (Kelly Rutherford) and Dan's father Rufus Humphrey (Matthew Settle), who share a romantic past that follows them throughout the show, and eventually leads to marriage.
Split into simpler sentences: Lily van der Woodsen (Kelly Rutherford) and Dan's father Rufus Humphrey (Matthew Settle). They share a romantic past that follows them throughout the show, and eventually leads to marriage.