Fatwa #19146

asalaam o alikum, please guide me through my difficult situation

My sisters in law (my brother’s wife) has hacked my personal email account and later said some very untrue things about me and tried to put me down front of my friends and family even with my brother who loves me. I just did not respond to anything she did to me or said about me. This is very disgraceful for women like me. Top of that it was all lies. She even went to my future to be husband’s family and told them some bad stuff about me. I never have any bad relationship with her or I never did anything to her (i assumed,just because my brother is very attached to me and loves me she can’t take that) And believe me if I’m saying this, she is highly respected and my brother loves her dearly, provided her all necessities but she always have doubt about him that he is having affairs. This is her second marriage, with my brother now it’s been 8 years small things she makes it big issue and now it is getting worse. I even told my brother just to make her happy cut off with me. We don’t have family here it’s just me and him, he doesn’t come at my place often but whenever he does she gets upset and start taunting him and then matter gets worse.  And mind that I am not even living  with them, I live independently and I don’t take any financial help from my brother just because of jealousy she does all that. My question is since she did that all to me do I will get punished by completely cutting off with her. (Not talking and meeting)  I forgive her for Allah sake.  I will say salaam to her if I just see her around. Please advice I read when you cut off with your family it’s not good. But now I have no choice. Please also tell in “qatah rahmi qatah taluq” who comes in your immediate family or every one you know.?

Secondly after all this the person is still standing strong and wants to get married.but rest of the family slightly went against me.  I can clear things by talking to them but I don’t want to since I strongly believe that Allah swt will show them the truth one day. My brother is also getting doubts that you should not get married to this kind of family who just changed on false things. Do you think, I should not get married to this person mind that he is waiting for me about 10 years. And he is not going to get married to anyone else. His deceased father purposed me for him since then he never considers any other girl. Please advice if the person is honest and sincere with you.  Do we still have to look for the family? what should  be done? I  want to get married and work on our hereafter but my sister –in- law hurt me so much with her disloyalty. I will inshaAllah do istakhara about this marriage but please help me with cutting off part. jazakAllah.

PS. since i dont go to her and my brother dont tell her that when he come to see me,now she is fine at her home.