[widgeon13]

I think you need to determine if your FIL had a will and who is to execute the estate. If the assets are held jointly I don't think there are any issues but I would check with an attorney before I did anything. Also, are there other siblings, there wishes should be taken into consideration as well as conferring with your MIL (top priority) to ensure you are meeting her wishes.

If there was no will the assets might have to go to probate before anything else happens. Just move cautiously.