My father has dementia and my mother wants to change her will to avoid him inheriting anything from her, should she die first. The aim is to avoid such assets being used by the local council to fund his care. My siblings and I would be the beneficiaries of her new will. Are there any dangers in this approach? For example, could the council challenge the will were my mother to die in the near future? I understand wills can also be ‘varied’ up to two years after death – so would it make more sense to leave her existing will in place for now and instead change it on her death?