Maddie James lived more than 50 years as a man and taught at St Lawrence School in Bradford-On-Avon for more than 30 years as Mr James.
Four years ago she started her transition to female and in an extremely powerful interview, the family from Box share the story of how they've adapted.
Maddie and Jane got married in 1980. When decades later Maddie told Jane she wanted to transition to female it was a life-changing choice for Jane to face.
Once Maddie and Jane had come to the decision they still loved each other and wanted to stay married they had to tell their grown-up children Nat and Fliss.
Four years after that conversation - and a lot of changes to family life - Nat told ITV News why he still refers to Maddie as Dad.
READ MORE: "I do feel very fortunate" - Wiltshire teacher accepted back to school after transitioning from male to female
Maddie has told ITV News she says she's incredibly grateful for the support of her family, but recognises not all transgender people have the same reaction from friends and family.
The James family say they hope their story will help other families going through similar momentous changes.