Peacefully, on May 19, 2019, surrounded by her loving family and close friends at 63 years of age. Beloved partner of Betty Gangnon for 25 years. Loving sister of Denise Summerfield, Tom Diemer (Cathy), Lynn Diemer, Richard Diemer (Nathan), Michael Diemer (Debbie), Tracy Sharron (Michael), Philip Diemer (Aline), Dan Diemer, the late Anthony Diemer (1987). Predeceased by her parents Francis (Duke) Diemer (1993), Jane Diemer (2015) and Teresa Diemer (1963). She will be sadly missed by her many nieces, nephews and grand-nieces and nephews. Loving Care Bear of Michael Gangnon (Niki), Brian Gangnon (Gayle), Erica, Nicole, Luke, Mark and Shaun. Karen was an outstanding employee of CIBC for 43 years. If you so desire, donations to the Canadian Cancer Society would be appreciated by the family. Visiting Tuesday 2-5pm and 7-9pm with parish prayers at 4:30pm at Families First 3260 Dougall Ave. South Windsor, 519-969-5841. On Wednesday, family and friends are invited to meet after 1:30pm at Corpus Christi Church (1400 Cabana Rd. W.) followed by Mass at 2:00pm. Interment to follow at Heavenly Rest Cemetery.