How to get relative's money from her friend

My mother was working in USA (NJ) as a caretaker of elderly. About 2 months ago she suffered from a stroke and was hospitalized for few weeks in NJ hospital afterwards was transferred to her home country in Europe, where she is now in a nursing home. Her lady friend was given her last salary from employer at which house she had that stroke, plus she received a partial deposit back from her landlord. This lady friend now refuses to send me my mother's money. My mother is now paralyzed and unable to speak, therefore all of her care is u to me and I have had numerous expenses during the last month that she is back. My financial situation is difficcult as is, I urgently need money that mother has with her friend now to provide and pay for current and upcoming medical expenses.