Alison and John had their first daughter Samantha in 1990 and then their second in 1998.
In 2006 during a conflict between the Resistance and the Combine, Alison tried to help a man named Simon Simms escape the chaos. During a large street war, taking place near the Nexus building, Alison was caught in gunfire and killed. Simon was sad at her death, and killed a nearby metrocop who had killed her.
Alison appeared in a flashback in 2010 showing her with a baby Hannah, which was presented to Nathan Johnson by Frank Blackstone, suggesting he may of played a part in her demise.