Go to www.whitepages.com
put in Antonio Couto for name and New Bedford, MA for city/state - a few come up.
To find her death - you could go to Mass Archives - they have the BMD index to 1970 on microfilm. If it's in that - you could go right down the street to Mass Vitals and see the actual record. If she died after 1970 you would have to go to Mass Vitals and look on their index. Archives is free, Vitals charge $9 an hour for research - first 20 mins for first time users is free(used to be).