Hi just wanted advice.My mum is 80 years old- she is frail but well although noticed she is forgetting minor things like appointment times.She lives with my sister who is 57 years old/ no children /has complex health problems .The house belongs to my mum. I feel me and my siblings need to plan ahead as my mum gets older - at the moment they look after each other if one of them is unwell.My sister may or may not outlive my mum.Not sure where to start with this really.I have power of attorney for my mum financial and health.My sister - has appointed myself for POA for health.My parents pur a clause in their will that when they die the house cannot be sold unless if my sister agrees- I worry how this will work as she is on benefits not working and could not afford all the bills.What if she has dementia or is unable to agree? I need advice on what is best to safeguard her future.Myself and 2 other siblings could help her with household costs initially.Any advice appreciated