Shaking the Family Tree is an episode of The Chipmunks series.
Dave invites his three living relatives to his house for a family reunion and has each boy go to one to invite them in person. However, things are not well between the aunts and uncle. Each Chipmunk finds out that the three of them have issues and believe many years ago each of them tried to sabotage the other in their chosen careers. After their relatives relay their stories, a feud boils up between the boys as well, with the family reunion being drawn between lines. Fed up with this, Dave sits everyone down and gets to the bottom of it, and each learn that a chain reaction of events caused the mishaps, not through spite of each other, and they all mend fences.