She was the second wife of Ethan Turner.
Cindy met and married Ethan after the death of his first wife. Their marriage, which lasted between one to fours years, ended when Ethan pushed Cindy off a cruise ship, killing her. After her death, Miguel Prado pressured the Feds into going after Ethan for murder. This failed, however, and Ethan walked free again.
Later, Cindy received justice when Dexter Morgan killed Ethan on a cruise ship (after subtle encouragement from Miguel).