Legal Question in Real Estate Law in Pennsylvania

I don't know what you mean by your aunt "took over" your grandfather's property. Was the land deeded to your aunt? Unless it was solely in her name or any other owners of the property consented, your aunt could not have mortgaged the property. Just so I understand, she mortgaged your grandfather's property to buy herself another house? Why didn't she mortgage her own?

From the fact that there are other alleged liens, it sounds like your aunt owned this property outright. Are the liens also attached to your aunt's property? A judgment acts as a lien on all real property owned by a debtor.

What is ypur grandfather's property worth? Your mother will have to buy the property for what it is worth. The lienholders would get the liens satisfied out of the sale proceeds. However, your mother does not personally pay for your aunt's debts. Unless something else can be worked out so that your aunt's creditors will release their judgment liens on your grandfather's property, I see no other alternative.

Your mother needs to consult with a real estate attorney in the county/state where your grandfather's property is located and she should direct her questions about the liens to the attorney and ask how those liens will be dealt with in order to get them released or satisfied.