widows benefits while still working

Working at age 60 will not disqualify you from obtaining survivor benefits, but starting benefits at age 60 while working may be unwise for two reasons.

First, if you delay initiation of benefits to later age, for example 62 or 65, your monthly benefit will grow larger. See here for details :

http://www.ssa.gov/survivorplan/1945s.html

Second, if you work while getting Social Security survivors benefits and are younger than full retirement age, your benefits may be reduced if your earnings exceed certain limits. (The full retirement age was 65 for people born before 1938 but will gradually increase to 67 for people born in 1960 or later.) There is no earnings limit beginning with the month you reach full retirement age.

http://www.ssa.gov/pubs/10084.html