WJen you say assets, you mean her savings and investments, yes?
If you are her POA, you should start selling them in a way that minimizes the tax bite and use the proceeds for the part of her NH bill that is not covered by her invome.
Consult with a Certified Elder Care attorney to get such information. You don't want any opinions on such an important matter, just facts. When it comes time for Medicaid to do a 5 year look back, you want all your i's dotted and your t's crossed, with no room for error anywhere.
If you are her POA, you should start selling them in a way that minimizes the tax bite and use the proceeds for the part of her NH bill that is not covered by her invome.