My parents got divorced when I was 16 and my mother remarried when I was 20. I never liked the man, still don't but am polite to him. We have nothing in common but my mother, and he makes her happy.  It has always been this way. His family treated me like dirt but he was always polite.  They have been married longer than she was married to my father.  He has two sons who I never really knew.  I only lived with my mother for a short time after she married him.