Definitely contact a title company first and make sure you check around. I agree with Micheal, contacting some of the top agents in your area and find out who they use and if they could recommend some to you.
I would find 3 of the most active real estate agents in your area, call them and ask them what Title Companies or real estate attorneys that they use, then call those companies. TIP: don't get hung up on price. Title companies are not created equally. There are some really good ones out there and some really bad ones too. You want the job done right !
It depends on your state, but basically a new deed needs to be prepared transferring the title to the property from your aunt to your mother. A real estate attorney or perhaps a title company can accomplish this for your family. I would not recommend trying to do this yourself.
Tihansley - You need to contact a Real Estate Attorney who can help you with this process.
The Marie Souza Team - Top Selling on Cape Cod
Cape Cod Real Estate Services