The facts as you lay them out appear to be Elder Abuse and possibly Fraud. I'd immediately seek the advice of a New Jersey-licensed Estate Planning or Elder Law attorney and if necessary the State Attorney General's office - Elder Abuse task force. Good Luck!
I agree with Attorney Potter that the facts as you describe them might be fraud. Please consult an experienced attorney in your area. Avvo is a good place to find one.
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This could be considered elder abuse and/or undue influence but it becomes more complicated in family situations and whether you or the other family members had capacity to consent. You may want to consider contacting Adult Protective Services to protect your mother. You should also consult with an Elder Law Attorney in New Jersey. Ingrid M. Evans, www.evanslaw.com, California
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