My dad made a will in 2010 where he would leave the house to my mother if he died and if she died it was to be split among their 3 children equally. My dad died in 2018 and this will has not been changed. Does it still apply or does my mother need to make a new will. She has been asking about it. The problem is that her memory not great lately and she being assessed so not sure would that have issues when it comes to making a new will