Help last will and testament

My Parents house is paid off and my sibling is on the house deeds . I have asked multiple times for them to remove her but my parents always say when we die it gets sold and split evenly but I never bother my parents with any thing and I do have trust issues with regards to sibling as they always borrowing money and has some previous debts moving in and out of parents from currnet partner legally I have no leg to stand of with inheritance as there is no WILL also .at the the end of the day I want to be treat equally as its alot of money amd never felt like I have but it will look like im just thinking about money im not I just want to be an equal