Unfortunately, you have no legal right to enforce as to the estate of your aunt. You were not a named beneficiary, and the people who were named have no obligation to grant you anything from the estate. In addition, nothing suggests an issue of fraud or undue influence in the making of the will.
The Will leaves too much to one person's discretion. But if it is as you say, then you have a right to challenge the administrator's discretion. You will need to prove to the court that it was your aunt's intent to leave you something to inherit. This isn't easy. I strongly advise that you seek the services of an attorney.
I agree with the other attorneys in that if you are not a named beneficiary you will have an extremely difficult time convincing anyone you are entitled to a share.
This is not legal advice nor intended to create an attorney-client relationship. The information provided here is informational in nature only. This attorney may not be licensed in the jurisdiction which you have a question about so the answer could be only general in nature. Visit Steve Zelinger's website: http://www.stevenzelinger.com/
I agree with Mr. Perry. In addition, extrinsic evidence will not be allowed to prove your aunt's intentions.
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