Direct your aunt to this forum or an attorney.

She can file a wage complain in the state that she was working in (where she lives is not so relevant here). If she was working in NY: https://www.labor.ny.gov/workerprote.../collwage.shtm
If she was working in NJ: https://www.nj.gov/labor/wagehour/co...age_claim.html

She should also keep an eye out as to whether the company files bankruptcy. Unpaid wages to employees are a priority claim there.