when my son first met his future wife, I thought 'watch out.' she was difficult ,I put it down to her father /daughter realationship as difficult, the psychologist in me thought projection onto me etc I thought I had worn her down with my kindness,over the past 5 years i refused her snidy remarks,her aloofness,last year I thought I had broken through to her better nature.recently I spent time with them over xmas period,she was back to normal! I think now she has some form of mental health problem,Ive stopped being nice until she, if ever wants to come round. its sad but an all to often situation.i keep to my truth and wont be affected anymore -lifes too short, our children make their beds......