and thanks Just Answer.
My name is ***** ***** am happy to assist you with your enquiry.
I am sorry to hear of your situation.
As your mother has not made a Will, when anything happens to her, her Estate has to be divided up in accordance with the strict Intestacy Rules. On the basis that your father is not alive, these rules state that her Estate is to be divided equally between her children.
This is so, notwithstanding the behaviour of the children during the deceased's lifetime.
As regards ***** ***** Estate, either of the next of kin (ie yourself or your sister) can apply to a local Probate Registry to become Administrator of the Estate. This is on a first come, first served basis and can be dealt with through a Solicitor or a personal application. Whoever is appointed as Administrator is then entitled and under a duty to distribute the Estate in accordance with the Intestacy Rules.
You do therefore really need to apply to become Administrator whenever anything happens to your mother. Then, at least you should be able to safeguard her belongings and monies and make sure that your sister does not take what she is not entitled to.
I hope this assists you and sets out the legal position.