 Pam s sister informs her she s moving to Dallas, unaware that Kathryn s also trying to move in on her husband, while Mark keeps trying to move in on Pam. Meanwhile, Bobby tries to find solace in something other than a bottle and Cliff can t get over the self-blame for the death of his mother. Donna begins to realize the serious effects of JR moving in on a senatorial seat in Washington when Dave talks to her about it because he feels threatened by the notion.