Margherita Mastroianni, who with her husband Donato, founded Don & Son Building Supplies, has passed away at the age of 80.

Known to family and friends as "Rita", she worked alongside her best friend and husband Donato at Don & Son Building Supplies for nearly 40 years.

Rita will be missed by her life partner of nearly 65 years, Donato, as well as her children Lou Mastroianni (Kim), Lucy Foster (Gord), and Robert Mastroianni (Michelle).  Rita was predeceased by her beloved son, Narcisio Mastroianni (Janis).

Visitation will be held at Oshawa Funeral Home, 847 King Street West, Oshawa on Tuesday, June 27th from 2:00 - 4:00 p.m. & 6:30 - 8:30 p.m.  Prayers will be held at 7:30 p.m.

Mass of the Christian Burial will be held at St. Joseph the Worker Parish, 1100 Mary Street North, Oshawa on Wednesday, June 28th, at 10:30 a.m. followed by Entombment at Resurrection Catholic Cemetery, Whitby.

In lieu of flowers, memorial donations may be made to the Heart and Stroke Foundation or Diabetes Association.

For family and friends unable to attend the service, please join the livestream.

Full obituary can be found here.