my. sister and I feel my older sister hide money from my mothers will

She was in charged of my mothers financial business. My mother was blind. My sister said not much was left. Socked but total believing our older sister we signed . At this point we had questions, but my mothers lawyer wouldn't talk to us, he said he worked for my older sister. Now that everything is settled, she and her children are spending money big time, and has stopped talking to us Is there anything we can do.