Social Security Disability Payments for Dependents?

My father past away when I was 11 years old from cancer. He was receiving benefits and it stopped when he passed. People would tell my mother that she could still receive benefits for the children (4 of us all underage), but she never went to apply.

We are all adults now and some say we can still ask for those benefits, kind of like back pay. I personally don't think we can just because we are all adults. Is there any truth to that?

By Marissa G