Uncle Frank is Peter McAllister's older brother. I assumed until this year he was Kate's, since Peter pays for lavish vacations, let's Frank cuss his sons, and doesn't beat him in the driveway for both. Maybe Kate stops him from doing it. BUT finding out that Frank is Peter's brother, it's all become clear that Peter is definitely involved in organized crime. Frank knows Peter's dark secrets, and maybe where the bodies are buried. Since he's the older brother, he shames Peter and plays off his emotions. Peter is a