Sometime this year, the 1940 census should be fully indexed. That would be a good chance to look for Mary Albretch and her brother Edward, in the same household. Edward could be a middle name too.
Does Laura have a copy of her Mother's obituary from 1961? If not, she should request a copy. If she died in NJ then you could make a request to the NJ forum for a volunteer to do a lookup. Request copies of her burial records directly from the Nat'l Cemetery. Request a copy of her Mother's social security app. Those records should at least have Mary's parents' names to help in a search to find any current living relatives.
See if there is an Albretch forum here or one at RootsWeb to help get the word out that you are trying to locate relatives of Mary Albretch Dabaghian. There are forums for Lost Family and Friends too.