My wife and her sister are agents under a power of attorney for their mother. We live in Pennsylvania and her mother is in a nursing home here. After repeated verbal assurances from the nursing home's social worker that the nursing home understood why there was a delay in applying for Medicaid (and no communication from the home to the contrary), two weeks ago the nursing home's attorney demanded that we submit a Medicaid application. The application was submitted in compliance with the nursing home's timetable, but we are still dealing with getting additional information that Medicaid has asked for. Now we have received a letter from the nursing home threatening to bill us for approximately $110,000 in room and board costs. What is our liability?