I was sorry to hear about your Mom when you posted your loss. I've been there when it came as a surprise with my Mom. Happened in just a few days. As an executer, I had to work with my sister and my moms husband and those two did not get along. I closed out everything as fair as I thought possible and to her wishes and told the others if you don't like what I'm doing get a lawyer. I know an executer is necessary but dam, but it was a pain in the arse with me and took around 11 months to sell her house extending the pains. Best wishes to you.
