You should hire a probate attorney to represent your interests in this estate. You can also open probate and ask the court to appoint you as the administrator of the estate. Do so immediately to prevent any further loss of assets.
Any individual seeking legal advice for their own situation should retain their own legal counsel as this response provides information that is general in nature and not specific to any person's unique situation. Circular 230 Disclaimer - Advice given in this response cannot be used to eliminate penalties with the IRS or any other governmental agency.
You should consult with an experienced probate attorney. You'll need to take a copy of the Will for the attorney to review. If your aunt has started distributing assets it is important that you act quickly.