This may be tough because you may run up against privacy restrictions, but here are some things that I would try.
Start with a timeline, a plan, a source checklist, and a research log
This may sound stupid, but start by making a list of all the documents you have. Take all the information you have and put it in a timeline, in chronological order -- and make notes about where the information came from.
I'm not going to insist that you write a formal style source citation as you might for publication, but it is helpful to write things down just to get them organized and to review everything. Making a chronological timeline alerts you to research opportunities that you may have missed (holes in the timeline). Pay attention to the three elements that Jessica Hopkins, an archivist at the National Archives at Kansas City, calls the "three-legged stool":
- Name -- Make a list of all known variants of her name. Include any variants that you find because names were mis-indexed or because of OCR errors and search for those "mistake" names, too.
- Date -- Pay attention to the scope and content of record groups / collections / databases to see whether the collection has the coverage you need. This is especially crucial in newspaper research because most websites don't have continuous coverage -- often there are missing issues and gaps in the collections.
- Place -- Be sure to search all known jurisdictions. For civil records, that might mean federal, state, county, town. For church records -- that could mean a local church, a diocese, a nation-wide archive belonging to that denomination.
Be aware that records often become archival and then, as the schedule allows, they become released to the public, by means of a schedule called a rolling window. For example, the US Federal Census is closed for 72 years after it is taken. The release of the 1950 Census is still 5 years away (release date is April 1st, 2022).
Document where you search, how you searched, and what you looked for as you go along, including negative search results (negative findings). The FamilySearch Wiki article Research Logs and the FamilySearch Learning Center Classes by G. David Dilts on Research Logs -- part 1, part 2, and Class Handout have a lot of useful advice. Think of your Research Log as your records wishlist and fill out what you want to look for before you begin to search. The articles Document as you go and Keeping a Research Log show how it's easier to keep on track and not miss things if you write things down as you go along.
Use whatever works for you -- a paper notebook, a document in a word processor, a spreadsheet, printed research log sheets, Evernote, or other software like Literature and Latte's writing studio software Scrivener -- whichever you choose, you want to write things down so when you stop researching, you can come back to it later and pick back up where you left off.
Some strategies you could try to find more information are below.
Investigate the Social Security Number
You may not be able to get much useful information from having her SSN, except as a confirmation that you have her records (and not someone else's) when you find other records that might have used her SSN as an identifier. See my answer to the question What uses are there for the Social Security Number (SSN) of a deceased ancestor?
But you could try searching the Social Security Death Index at different sites to compare the information you get from each site. See What fields are available from a Social Security Death Index (SSDI) search at different websites? Look at the field called "Last Residence" or "Last Benefit" -- these could be clues to where she lived late in life, or where someone received a survivor's benefit after she died.
You could also try looking for her in the NUMIDENT files at the US National Archives (NARA)'s Access to Archival Database (AAD), to see if you can find any information about claims or benefits she applied for -- if she falls within the scope of the database. Numerical Identification Files (NUMIDENT)
The AAD website says:
This series contains data from the Social Security Administration's
Numerical Identification Files (NUMIDENT). The Death Files contain
nearly 50 million records of individuals with a social security number
with a verified death or who would have been over 110 years old by
December 31, 2007. The records include information such as name,
social security number, birth date, and death date.
Some cautions: I have had partial success searching these files by the Social Security number itself.
John LeGloahec's presentation “Death Records from the Numerical Identification System” for Genealogical Research (2017 March 23) gives an overview of the database and some of the problems in it. He advised users to search for people both in the alphabetical file which would hold their surname AND in the final file (Last names U through Z and non-alphabetic) because some entries have a typographical errors. The handout links for this presentation:
Watch out for an entry in the "Other number" field, which in some rare cases links the SSN to that of a spouse.
Look for obituaries
Obituaries sometimes give names of survivors along with their residences. These websites can help you find historical newspapers online:
What other records might have residence information?
When you're drawing a complete blank about what to look for, use a checklist or another prompt for record selection:
It is not site policy to answer questions about finding living relatives, but here are some links that might help.