my neice was the executor of the estate on my grandmother''s will. my mother was second and was third on the will. the property was not a part of the

I'm not really sure that I understand the question.  Is it that your niece lived in a property owned by the decedent and that some how liens were placed against the property which were then paid off using the proceeds of the sale of the property?  The only thing that could have been there would have been property taxes, you can't create a lien on property you don't own.  So even if your niece incurred debt it would not have created a lien against your grandmother's property.  In any event, as a beneficiary, your mother has a right to request an accounting of the estate, as well as the HUD statement from the closing on the property.  Get those documents and see where the liens came from and request that those monies be credited back to the estate.