You do not have an attorney handling probate? If money is needed ommediately to pay for the mortgage - and all heirs agree, I would suggest that the personal rep prepare a detailed accoutn of twhat property is to be sold - the amount received from the sale of the personal property - and a complete accoutnig of where the proceeds from the sale went. This will keep a clear record of all assest for presentation to the probate court.
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Please note that these comments do not constitute legal advice. It is always recommended that you consult with a local attorney, who can explore all the facts and issues of your specific situation and then advise you of any legal rights and remedies you may have under the current laws of your jurisdiction.