 He moves into an apartment with Jack (Matthew Lawrence), who turns out to be Shawn's half-brother.Shawn clearly shows his hatred toward Jack and refuses to live with him because he was upset that Jack never called or checked to see if Shawn and his dad were doing okay (Shawn eventually discovers that Jack never received any of Shawn's letters, or he would have come to see him immediately).However, after being convinced by his father and others around him, Shawn moves in with them but finds he has nothing in common with Jack, which causes a lot of tension.