The surviving spouse, obviously, does not understand her rights. If I were this woman's daughter and learned that my mother did not understand her rights as a surviving spouse, I'd be coming after the executors with a vengence for exploitation/elder abuse.
The surviving spouse is an intelligent, articulate woman. I'm sure she fully understands her rights, as well as her adult children who have given no indication, one week after the death, that they feel their mother is being exploited. True, she could change her mind. Actually, I don't know at this point if the children have been told by their mother about her plans to disclaim.
Thanks for your input.