Contesting a Will is one thing, contesting a beneficairy designation on a life insurance policy is another. If you think you have strong proof of fraud or influence consult with probate litigation attorney. Be prepared to spend a lot on legal fees. Such cases are difficult and expensive.
Any opinions stated in response to Avvo questions are based upon the facts stated in the question. Responses to Avvo questions are for general information purposes only, and should not be construed or relied upon as legal advice.
You have a very hard case but proof of incompetence or fraud or undue influence would give you a chance.
The answer given does not imply that an attorney-client relationship has been established and your best course of action is to have legal representation in this matter.
Undue influence and lack of capacity are reasons for contesting a Will; however, both are difficult and costly to prove. You should consult with an attorney experienced in probate litigation.