She and her 76-year-old husband John were found lying dead side by side by their children at their home in Bideford, North Devon.
They were holding hands, their heads were together on the pillow, and they had left notes addressed: "To my loving family".
The couple killed themselves by taking an overdose of the painkiller the woman had been given.
Her husband was also suffering from a painful bowel condition called Crohn's Disease, but was otherwise well. He, however, chose to end his life because he could not face living without his wife.