My sister putting a case against my father and me about property.

Hello, In 2019 my mother was hospitalized and her situation was very tough. She put on ventilator. As she realised about our careness and my wife careness she immediately call lawyer to change the will. At that time I know about my parents already prepare a will in that will the property is divided into 4 parts. One for me, one for my brother , one for my sister and last for herself and for my father so she was changed the will that is vasiyat and make 3 parts and remove my sister. And said that she was already gave gold , so many things after her marriage. So now there is no need to give her. Because at the hospitalized time , my sister's husband was just talking about the property instead of my father illness. After my mother death, we will go for procedure to transfer the name of our house that is we transferred my mother to my father name. At that time , my sister put a case against me any my father in 2021. We won this case in 2024 but now she will go for high court and now she planning mental harrassment. My father having Cancer and also my wife having a cancer they both recovered I got heart attack in March but my sister is not ready to understand she is just listening her husband so what to do ? And what should I do can I make legel dastavej durimg hearing of high court? Give me suggestions.