O'Brien, Dorothy A. of Cambridge. Peacefully at home on November 2nd. Devoted daughter of the late Robert and Anne O'Brien. Cherished by her brother Frederick O'Brien and his late wife Mary of Cambridge who was also Dorothy's best friend. Deeply loved by her nephews James "Jimmy" O'Brien and his wife Kim of Bradford MA, David O'Brien and his wife Solita of San Mateo, CA. Also survived by her Great Nephews Brant and Corbin O'Brien. Funeral from the DeVito Funeral Home 761 Mt. Auburn St., WATERTOWN on Monday at 9 AM with a Funeral Service to follow at 10 AM in the Belmont-Watertown United Methodist Church. Burial to follow in Mt. Auburn Cemetery. Relatives and friends are invited to visit in the funeral home on Sunday from 2-6 PM. In lieu of flowers, donations can be made in Dorothy's memory to Good Shepherd Community Hospice, 90 Wells Ave., Newton, MA. 02459. For directions or to send an online condolence visit, www.devitofuneralhomes.com.