Please, tell me about the benefits she could get and at what age?
your widow could get reduced benefits as early as age 60 or full benefits at full retirement age. If she suffers from a disability, she could get the benefits as soon as she turns 50 if the disability started before your death or up to 7 years after your death.
What is the maximum amount my family can get from Social Security?
It varies, but there's a limit that's generally between 150 and 180 percent of the basic benefit rate.