We are Family, or are we NOT?

During a Thanksgiving round table discussion, it was voiced that a husband and wife were having conflict about visiting with their respective families during holidays. Whether they should go together or separately was expressed. It was a passionate exchange. Divorce and Separation were mentioned. It seemed like other factors were involved and that family lines and whether and how to negotiation differences were major discussion matters.

What are your thoughts on this layered topic? How do you suggest differing parties attempt to resolve such differences?