This preeminent Houston political power couple is in the middle of a slow-motion divorce proceeding, possibly because their business affairs are impossible to untangle. Between them they represent just about anything that could be considered establishment in Houston. Sue raised money for mayor Bob Lanier, handles incumbent Lee Brown's finances, and lobbies for energy giant Enron. Dave, a former chief of staff for County Judge Jon Lindsay and mayor Lanier, helped martial the stadium and arena forces in recent victorious referenda, and represents the Houston Astros and the new Houston Texans professional football team. His most innovative position: domestic relations adviser to Lanier's adopted daughter, Courtney Lanier, when she was drawn into a nasty divorce proceeding between hubbie-to-be, Chris Sarofim, and his ex-wife, Valerie. Naturally, Courtney came out of it all smelling like a rose and worth multimillions.