I am experiencing this right now. We inherited my mother- in- laws's house a year and a half ago, just before everything really crashed. We have had it on the market for over a year. We have lowered and lowered the asking price, but every deal we have had has fallen through, because people just can't get mortgages. The house had a mortgage on it & with the taxes, it is costing us $1,900 a month plus utilities, ect. My mother-in-law would never in a million years have guessed what a burden this would have turned into.
You really expect anyone to believe that you inherited her mortgage? I could believe you if you were trying to sell the house for the estate and you were an executor - but you can't inherit a house with a mortgage in someone else's name. You would have no legal responsibility (unless you were on the mortgage already, which is something you might be failing to disclose - and in that case, it would have already been your house)
You don't inherit a mortgage. The bank cannot transfer the obligation to another family member not already on the deed. But the mortgage does stay with the property. So if you are the designated heir that mortgage has to be satisfied by the estate, or you or reaffirmed by the new owner. It doesn't just magically disappear at the death of the original owner.
So while the OP may not be personally liable for the mortgage the inability to sell the property means the estate is being reduced each month by the required payments and cannot be finalized. It seems the money is flying away every month I'd guess.