Dear Prudence,
About two years ago my parents separated and are now divorced. They both had affairs, and my dad left my mother for the woman he had an affair with. We’re still working on blending the families, but two of my siblings, one in particular, have refused to accept my dad’s fiancée. My brother has said that he will not budge until they break up. My dad says that he’s done appeasing my brother and has to stand up for his relationship. I’m worried that he’s about to torpedo his relationship with my brother, but I can hardly expect him to end his engagement. My brother steadfastly refused to go to my dad’s for Christmas and continues to reject any of my dad’s attempts to get them in the same room together. I don’t know how to talk to either of them anymore. How do I help keep my family from falling completely to pieces?
—Family Breakup