Legal separation from a narcissist wife

My wife is too much suspicious & slanders me all the time. I am ready to give her anything she wants in terms of property but I need to live peacefully. Her malicious claims every now & then without any proof is seriously affecting my professional life. She keeps on linking me with one lady or the another eg coworker, lady swimming close in the beach whom (I don't know), & likewise without any proof. I work in UAE & from 2022 onwards my wife started coming here & creating these kind of problems. She keeps coming & going. Earlier she was not willing to come here as children's were still studying & staying with her. Now she is claiming that, because of me she was all the time away from me & therefore I could not meet her personal desires (sexual) & that I kept her deliberately away. And now she is claiming (with no proof) that I had relationship with someone here & that is the reason that I had left her in India, which is not true. Before 2022, she did not say once that she does not want to stay in India with kids & would come here. Now that my son is already working & moving out from house with friend's during weekends & also as my daughter has moved to hostel for her PG studies, she has come here. Sometimes it becomes so unbearable that I hit her also which causes physical harm to her. I know it is not right to hit a woman but I cannot control. We live in Navi Mumbai & she has recently gone there. Even she is fighting with my son who is now 30 & working in a bank. She is even sending msgs to my other colleagues in the office & discussing all these things that I do not give any attention to her, that I have some affair & that is why I had left her in India, etc. I have just few month's for retirement & I don't know what to do after I come back. She hits me with whatever she finds in front of her & uses very abusive language of the lowest order to slander me. I am unable to deal with such mental harassment any further & therefore would go for legal separation.