Just an update on this situation. I finally got a hold of my sister and talked to her about it and she filled me in on a few things and I guess I feel better now about trusting my uncle. I kind of feel like an asshole for being as mistrustful as I have been, but then again, I'm a survivor and being mistrustful kind of comes with the territory.
My mom did write a will and after talking for a while with my sister about it I feel satisfied that things will be taken care of properly. Yeah, I guess there's a possibility I could end up getting burned but I just feel like the last thing I want to be is one of those money bickerers after the death of my mother.
I want my family relations intact because I really don't have that much family left anymore.