My aunt died and I believe there is a will. How can I find it?

My aunt died and her sister is being evasive about the estate. I believe my aunt had a will, her sister says there isn't one. She has been writing checks on my dead aunts accounts and has not put the estate in probate that I know of. She and I are the only two relatives left and we should be the heirs but she says I need to sign a power of attorney to allow her to settle the estate. I think something's wrong with this picture. Should I get my own attorney (my aunt has one but won't give me his name). How can I track down a will? I live in L.A. and she is in Atlanta Ga. I am preparing to go there next week. What is the best way for me to proceed once I get there? I don't have much money and want to do the right thing for my deceased aunt and also protect my possible inheritance. There is a house and several bank accounts involved and I don't know what else. My aunt passed on July 30 and her sister has been staying at her house, I think and as I said writing checks she says "to cover the bills". She says her lawyer told her to go ahead and do that because "Who's going to know?" Is this legal? Would a lawyer really tell her this? I am so distressed because this is sounding so very wrong.
I am so very appreciative for any help you can give me. I will be in Atlanta Mon.-Fri. only. What should I do to make the best use of my time towards protecting my aunts estate?
Again THANK YOU.
Most Sincerely,
Kathee [Last Name Removed] - Is this your question? Add additional information