My Aunt Became Poa For My Father With Dementia, Changed His Life Insurance To List Her As The Sole Beneficiary.

My father had a stroke in 2014 and his mental state slowly degraded over the last several years leading to his death in November 2024. My aunt became his power of attorney in 2022, taking over his life completely. She took me and my sister off his life insurance and changed his will to exclude us entirely. When Aunt moved my father out of state to be closer to her she also sold his house and entire estate further alienating us from him, then immediately put him in a home upon arriving in her state. This week I was informed "accidentally" by the life insurance company, Mass Mutual, that we (my sister and I) would receive his death benefit. I was unaware of the changes to his insurance policy so I submitted the claim, come to find out she already claimed the death benefit earlier this month. His notifications of his death were also a delayed response from my Aunt, waiting over a week to tell us that my father passed and another week before receiving his death certificate. During this time she took out his policy.

As my father's medical documents show his diagnosis of dementia before the changing of will and insurance policy, am I able to fight the changes and return the DB to me and my sister.

There's a whole story here but I'll explain more in updates if needed.