She was visiting her brother Arthur (who was ill with pneumonia at the time), and died suddenly.

Her obituary from 1944:

MRS. LEVI DUGO (1944) - With a suddenness which left her family and friends dazed, the death of Mrs. Levi Dugo occurred on Sunday, September 17th. Deceased had been in her usual health, and went to visit her brother, Arthur Cavanagh who is ill with pneumonia - when she was suddenly stricken and died almost instantly. She was 65 years of age. The late Mrs. Dugo was born in Pakenham, a daughter of John Cavanagh and his wife, Sarah Styles. In 1901 she was married, to Levi Dugo in St. Mark’s church, Pakenham, and came as a bride to the home on No. 17 Highway, where she had spent all her married life. She was of a quiet, kind disposition and made her home a world of strife shut out and a world, of love shut in. She was very fond of flowers and liked nothing better than working in the greenhouse, and always said the time spent among the flowers was as good as a tonic. Besides her husband she leaves to mourn her loss one son Herman; two brothers, William and Arthur Cavanagh, Pakenham, five sisters, Mrs. Lizzie Latimer, Boissevain, Man.; Mrs. Margaret Anderson, High River, Alta.; Mrs. A. M. Timmins, Mrs. R. T. Timmins, Pakenham; Mrs. Robert Graigner, Kinburn, and a sister-in-law, Mrs. R. D. Richey, Arnprior. The funeral took place on Wednesday afternoon from the family residence to Emanuel Anglican church, Arnprior, where service was conducted by Rev. P. Caiger-Watson. Interment was in Arnprior cemetery. The many beautiful floral offerings were evidence of the high esteem in which deceased was held by a wide circle of sorrowing friends.