Demand she produce the Will and anything she claims supports her position. Tell her if she will not, you will file to probate your father's estate [read Nolo Press books on what is involved], which involves filing for probate in the county where he resided and if she has taken anything she is not entitled to you will have to sue her and see if there is an criminal liability on her part. In California, unless he left a valid Will stating the opposite, the children of the deceased [if there is no wife] usually get all the assets, not the grandparents.
Answered on Jan 27th, 2016 at 5:13 PM