You're lucky they asked. I got SSDI , but for the first year, they never asked kid's SS, I brought it up, got back pay and now 2 checks for them every month. I was told once they lost my file, believe they never found it, am in system with kids included now. Kids are expensive. The kid money I put in College funds. Kids are expensive. Did I mention kids are expensive? Back pay went for braces. YIKES!!