If you are 60 and have lived your parent over 12 months as carer, then house is not assessed for the payment of care immediately and you would be able to continue to live there.
However that only applies to the payment of care and not in the event of death.
The way the courts view this is is that it would be unfair for the rest of your siblings wait around for years until such time as you decide you no longer want to live in the house.
The court would also look at the terms of will and decide that it was not what your mother intended. The reason for that is that it is really easy for your mother to have put another sentence in the will (particularly if the will was done by solicitors) to give you the right to live in the property for life or a period of years after which it could be sold. All that would have needed would literally one sentence in the will.
The bad news therefore is that once your mother dies the house will be sold and the proceeds divided.
I’m sorry that this is bad news for you. Can I clarify anything?
I am 42 yrs old and moved in with mum after my dad died which is 10 yrs ago . To be honest i think your answer is what i expected ; and probably with my mum having dementia now - even my eldest sister having power of attorney the will cannot be changed?