Doris M. Oster (Friedenberg) of Stoneham and formerly of Arlington passed peacefully on February 26. Beloved husband of the late Edward Oster. Devoted mother of David, Albert, Jeanne, Annette, and Beverly. Loving grandmother of Alexander and Isaac and great-grandmother of Soleil. Services at the Torf Funeral Chapel, 151 Washington Ave., Chelsea on Wednesday, March 2 at 11 AM. Interment to follow in Everett. In lieu of flowers, contributions in Doris’s memory may be to a charity of your choice. For online guestbook and directions, please visit the funeral home website, www.torffuneralservice.com.