Hello Alex.
According to the obituary in "The Leader-Post" from Regina, Helen died on Thursday, Feb. 16 1989.
The obituary is in page 53, Feb. 18 1989, almost at the bottom of the first column.
https://www.newspapers.com/newspage/497207134/
Scroll down a little bit in the page of the link above and click on "Show 53 article text (OCR)" that you will find at the left hand side of the page. Use your browser's function to search for the text "Helen Jean McRae" and you will find the obituary.