Kevin was married three times. He had two children from his first marriage and 5 grandchildren all of whom he remained very close to until his death. Kevin was very generous with his substantial wealth when it came to his family and his favorite charities. He frequently told the children and grandchildren that they would be taken care of upon his death. While married to his second wife, he executed a will that provided for her during her lifetime and left the remainder of his estate in trust for his children and grandchildren. When his second wife died, he changed the will to give $3 million to each of his children and $1 million to each of his grandchildren. The remainder of his estate was bequeathed to his three favorite charities to which he had been the main financial supporter throughout the last 25 years. He was married only five months to his third wife, Nancy, before he passed away. One month into their marriage, Kevin was diagnosed with a brain tumor that affected his memory and his reasoning abilities. During the marriage, Nancy took control over all of Kevin's financial enterprises and continually advised Kevin that she thought that his children and grandchildren were ungrateful and disrespectful. The week before he died, he executed a will that left his entire estate in trust to Nancy for her life and then to a foundation that she controlled. Was Kevin's last will valid or the result of undue influence?