Over the course of the character's narrative, it was revealed that one of the reasons for Stacey's tough and malicious exterior was her troubled family life - specifically the death of her father, disappearance of her brother, and her mother's bipolar disorder.
Although Stacey and Bradley split up at Christmas 2007 when her affair with Max is revealed, they get back together in December 2009 following Stacey's diagnosis with bipolar disorder (see below).