Sue is the adoptive mother of Sonia Jackson and Martin Fowler's daughter. Sonia gave birth to baby Chloe in 2000, but decided to give her daughter up for adoption. Chloe was placed with Sue and her husband Neil, a childless couple, though this was not seen on screen. Sue and Neil changed Chloe's name to Rebecca.
In 2002, Sonia kidnaps Rebecca while Neil and Sue are out. Sonia tells their babysitter that she is a family friend, and snatches Rebecca, taking her to Walford. Neil and Sue work this out and trace her. While Sonia barricades herself inside her house, the Millers give Dot Branning fifteen minutes to persuade Sonia to hand Rebecca over before they phone the police. Just before the Millers are about to call the police, Dot successfully persuades Sonia to hand Rebecca over.
Sonia reads in a newspaper in 2005 that Sue and Neil have died in a car crash. This leads to her gaining contact with Rebecca again.