My mother, in her 90s was with her solicitor writing a new will. My sister and B-I-L were there with her.
I get a call from the solicitor saying that Mother has changed her will so that my B-I-L also gets a third of the property. I was told I could contest this if I wanted.
I will add that Mum is definitely loosing some of her marbles but she is still living on her own and doing for herself!
I immediately made a decision but would be interested in what others would do or feel in the circumstances.