Unfortunately, living on a property, even for decades, with someone's permission gives you *no* legal rights to it; you are only a guest, and a guest can remain only so long as the property owner allows her to. The property owner--which includes the new owner(s) after the original owner passes away; in this case, your grandmother's daughters, who presumably inherited the home either under a will or (if there was no will) under intestate succession--has the right to tell a guest to leave whenever they want, or to set conditions on staying(e.g. pay rent). Your grandmother's wishes have no legal authority after her death, unless they were put into a valid will. So if the daughters inherited, as they presumably did (as her daughters), they have the right to ask you to pay to stay there or to leave; and if you refuse to do what they want or to leave, they can bring a legal action to have the courts and law remove you (such as an action "for ejectment," which is an "eviction" action for guests and other non-tenants). You cannot claim the land as yours under "adverse possession" because you were there with your grandmother's permission--permitted guests cannot claim land. Based on what your write, you appear to have no rights here: you can be removed at will by the new owners unless they agree to let you stay (e.g by paying rent). If you and they do agree to let you stay for paying rent (or paying the taxes and maintenance, etc.), get that in writing and try to get the lease for as long a term (as many years) as possible--once you have a written lease, which is a contract, you have enforceable rights.