Sorry about the death of your mother. If she had only taken the time to make a Will you wouldn't be dealing with this conflict now. Ahh, that's all in hindsight; maybe Mom thought you and sis could get along well enough to sort through her "treasures" after she'd moved to the "Big House."

It seems to me that you might be better off to make sure there is a police officer or sheriff's deputy standing by at Mom's house when the property is divided. May I make a solid recommendation? DO NOT LET ANYONE IN THE HOUSE WHO HAS NO ENTITLEMENT TO THE PROPERTY. That means your wife and children or grandchildren or sister's husband and children or grandchildren. There is a thing known as "planned theft" and it's usually committed by those other than brothers and sisters. I could tell you some horror stories that happened in my spouse's family.

I'm sorry your're having to fight a battle with the person who should be there for you at this grevious time. I wish you comfort and fond memories of your mother.