You have a right to contest the Will once she is gone, but not before. However, if she is not of unsound mind and she wants to give her money to your sibling, that is her absolute right. Perhaps she has a different take on why she wants to give him more money than the rest of you and your siblings. The same holds true of the beneficiary status under the life insurance policy. No, you don't have to sign off on her Will. It's entirely her business and nobody else's what she does with her estate. Sorry. Good luck.
Answered on May 03rd, 2011 at 10:02 AM