sentences:  Chet had Shawn live with Jack during Shawn's senior year in high school, effectively having Jack taking over the guardianship for Shawn from his father and Jonathan Turner until his half-brother's graduation, though Shawn eventually moved back in with him later.Like Eric and Cory Matthews, Jack and Shawn share a comical and somewhat hostile sibling rivalry which ultimately ends with reconciliation; they have acknowledged each other brothers with Jack entering Shawn's life.Jack became Eric's roommate, and the pair developed a friendship parallel to their siblings'.