There is nothing more painful than fighting between family members. Whether between parents who are married or divorced, or between siblings, there is nothing more bitter than watching people who once loved each other say painful things to one another. Family member know each other better than anyone. They know each others vulnerabilities and can hurt each other in the most private and intimate places. So before you say something to a family member, no matter how much you think that they deserve it, remember, the pain of the memory of this encounter will last much longer than the satisfaction of a good one liner.