Cutting off relations with the sister for claiming her share in the inheritance

Q: My mother is blind, but Allah has compensated her with keen insight. Her share of inheritance was kept by my only maternal uncle, but when she demanded her lawful share as prescribed he refused to give her share this year. He told her he will do so in a year or two without specifying an exact time. My mother and I then went to courts after all efforts of reconciliation failed. He utterly refused to give her the lawful share of the estate. We went to the courts and filed our suit, and praise be to Allah, my mother obtained her lawful share. As a result, my uncle reacted negatively towards my mother; he stopped talking to her from that moment on and did not come to visit us in our home. However, I went with my mother to visit him many times without a single visit on his part. I always reminded my mother of the Prophet's statement A breaker of ties of kinship will not enter Paradise It happened that my mother and I intended to perform `Umrah. Thus, a week before our trip, I suggested to my mother that we should (Part No. 25; Page No. 357) visit my uncle, so that Allah might accept our `Umrah and she agreed. We informed my uncle and his family of the date of our journey, but they did not come to bid us farewell. Thanks to Allah, we performed the rites of `Umrah and stayed until Hajj season. During the rites of Hajj, we met my uncle and his family in Mina, greeted them and settled the matter. However, on our way back to Egypt, my uncle continued severing our ties. He did not enter our house or greet my mother in front of others or in our house. This led my mother to decide that she will never go to him again, because she is blind and he is not; therefore, it is he that should come to visit her. She even swore not to go to him again. I have lived here in the Kingdom for a long time and I have sent him many messages to which he has never responded. Kindly give me a legal Fatwa in this regard. Should I sever the ties of kinship with him the way he has with my mother?I would like to inform you that my father advised her not to get upset; if my uncle comes to visit her, he will be welcomed, and if he does not, it will be up to him. However, my mother became ill because of this. Seven years have passed since my uncle stopped visiting us or talking to my mother. What should my mother and I do in order not to come under the ruling of the Prophet's Hadith, A breaker of kinship ties shall not enter Paradise. Finally, may Allah's Peace, Mercy, and Blessings be with you!