If she is on Medicaid, she is not allowed to do what she wants with this money.
It will likely have to be reported and spent down for her care. You should discuss with an Elder Law attorney in IL, or else contact Legal Aid.
A relative in New York bequeathed $10,000 to his caregiver who was on Medicaid. It had to be reported and until this money was spent down for her care, she was off Medicaid and as soon as the funds were depleted, Medicaid resumed.