Mum (real name Sandra) is Dad's ex-wife and Angry Kid and Lil' Sis's nice, unseen, and pleasant mother, who really loves her children.

In the Angry kid "Who Do I Think I Am" special it is shown that Mum has been "gone to the store" for 5 years, it is then applied that Dad drove her away. In Series 3, it is revealed that Mum is in a relationship with a man named Stephen.


  • In the Series 3 episode "Stephen", it is revealed that Mum's name is Sandra.