Carl,

If they married in NYC you can use this free search to find her husband's full name:
NYC Marriage License Index 1950-1995
https://stevemorse.org/vital/nymarriages-rec.html

If they married in NYC before 1950 you can try this database on Ancestry, or if you have access to Ancestry just try this one since it covers more years:
NYC Marriage Licenses 1907-1995
https://stevemorse.org/vital/nymarriages-anc.html?range=1

You can also use these databases to see if her husband re-married.

Good luck in your search,

Sherri Bobish