Chris Cwej's mother

Mrs Cwej was Chris Cwej's mother and Mr Cwej's wife. She was, at the time Roz Forrester and Bernice Summerfield met her on Earth, of retirement age. The Seventh Doctor fixed her irradiator, a kitchen appliance that she had correctly guessed had a faulty techbrain. (PROSE: Original Sin)

Behind the scenes
Neither Cwej nor her husband's forenames were revealed by writer Andy Lane.