My son is getting married soon. His father and I have been divorced for several years. He married the woman he was having an affair with when I was pregnant with my son and they have now been married for several years. She has been the step mother to my son and her family has been involved in my son's life since he was born. My son has a good relationship with his step mother and her family. His father will be his best man. What is the proper seating for the step mother and her parents at the wedding? The step mother says her parents will sit with her husband's parents. The bride does not want to offend my son's father and his wife and just wants everything to go smoothly. My son will not stand up to his father so we hope proper etiquitte can help us. Thank you.