My elder sister who is 26 years of age has some personanlity related problem.She thinks too high ofherself.She thinks others are inferior to her and doesnt like socializing with people(like her own relatives).she lives in her own world of fantasies but has no focus in life.extremly disorganised.doesnt show any interest in helping in the house at all , wants mom to do everything for her. very rude and argues with parents in a very harsh manner. extremely arrogant and very violent at times when parents try to reprimand her......... Please help in analysing as to what kind of therapy or treatment she needs